Does a Hard Start Capacitor Make My Ac Cold Again

Air Conditioner Compressor Hard Start FAQs
Q&A on diagnosing, fixing an AC compressor that has trouble starting

• POST a QUESTION or Comment about diagnosing and fixing difficult-starting A/C or rut pump compressors

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Q&A on difficult-starting HVAC compressor motors:

These questions & answers about hard-starting air conditioner or heat pump compressor motors help diagnose why the motor may hesitage, be slow starting, or may continue to fire out the starting capacitor.

This ac repair article series explains procedures for the diagnosis and repair of hard-starting air conditioning compressors.

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FAQs on A/C Compressor Difficult Start or Intermittent Run or Stutter

These questions and answers about HVAC compressor motors that have trouble starting were posted originally at Difficult STARTING COMPRESSOR MOTORS

Photo: a motor starting capacitor, a mutual repair try for hard starting Air conditioning compressor motors. [Click to enlarge whatsoever image]

Question: condenser fan keeps running all the fourth dimension

July 3, 2014) Boyd said:
my condenser fan runs all the time and i noticed it plows cool air, why would my unit of measurement non be warming up

Reply:

Boyd:

If you're looking for oestrus from a heat pump check that the thermostat has been set to heating mode.

If the condenser fan NEVER turns off then I doubtable a relay or control board failure.

See

• FAN, COMPRESSOR / CONDENSER Unit

Question: voltage issues with an LG 1.5 5 star Air-conditioning

24 May 2015 Deepak Kumar said:
I am using LG 1.5 5 star AC from past 6 years recently nosotros are facing some problem related to voltage. AC is working fine.

Whenever I switch on the ac in betwixt 9pm to 11pm the voltage will fluctuate, later on 11 pm it volition piece of work like charm. fluctuate means the outdoor unit will be running and their is no cool air is coming from ac. I need to restart the air conditioning. Its been three months I am facing this event. If I turn on the ac after 11 PM so their is no problem. Kindly suggest what I tin can do?

Thanks in advance.

Regards,
deepak

Reply:

Deepak

A problem with an electric motor (such as your AC compressor) might cause loftier current draw but I would not expect information technology to affect voltage.

Voltage is determined by your electrical supplier. I suggest starting by asking an electrician to check the incoming voltage at your electric service, or possibly to mount a monitoring device at that place.

Keep us informed and we'll accept it from in that location.

Question: Haier 1.5 ton split air-conditioning after switching on it blows cool air for 10 minutes

26 May 2015 podeswar said:

i am having Haier one.v ton split ac after switching on it blows cool air for 10 minutes n so it blows hot air the complaint is not retifaing loaded gas changed coil inverse condencer only the trouble is not rectifaied the compressure is getting over heated

Reply:

Get-go past checking for cooling coil icing. See COOLING Curl ICING or LEAKS

Rheem condensor only runs for 1/2-2 hours at a fourth dimension and then quits. Take had a/c tech out several times.

Replaced breaker, inverse wiring in thermostat, reconnected loose wire at furnace. Notwithstanding not corrected. Could information technology exist the thermostat? Unit is most 10 years old. Tech wants to come back and check 2400 ohms at furnace to same at condensor.

States if not same have to either replace wire in wall or I have a bad control lath. Does this sound right?

Anonymous:

The refrigerant force per unit area behavior you lot describe sounds normal - normal pressures beingness developed when running and normal equalization when off.

I'grand not sure the compressor is really OK - I'd doubtable a control board except you lot written report that the compressor motor gets abnormally hot. Meet ELECTRIC MOTOR DIAGNOSIS tests for details that explain that testing an electrical motor (like a compressor) when it is not running are helpful simply incomplete.

Or perhaps check the maunfacturer'southward specs on operating temperatures for the compressor and compare those to what you are actually seeing. Keep us posted - what yous observe may permit more comment and will too help others.

Trouble: AC compressor starts and runs for 30 to 45 seconds then shuts off. Compressor 220v /1 stage 2.5 ton scroll. During this time it gets very hot..and so cools off and would restart once more to run for merely thirty or so seconds. Adequately new compressor less than a year one-time.

Checks already done: All start and run capacitors checked and are adept./

Compressor windings checked across all iii terminals and ohm out good./ Potential relay is checked and cuts it out of circuit as designed with amp meter./ Voltage is good. / When guages are attached to high and low side and the compressor starts the pressures movement as designed both high and low.

When information technology shuts off they equalize. In other words no loftier head pessure etc.
Question: Could the internal estrus overload protection be faulty...i accept rarely seen this.

b4 u mention about ur aircon problem u should diagnose advisedly check all electrical coponent b4 u give the cause of the problem sometimes the problem coming from the tech w/wrong diagnose of the units make it certain that u should bank check it all i by one cheers

Jack, often a humming and delayed first means that at that place is a bad start/run capacitor or a bad motor. I'm non certaint that your capacitor examination was complete (though it was a good idea) - for case if a motor is hard starting and a cap defective, it may seem fine when mounted at another motor that is not hard starting.

There are some compressor measurements & tests that look for an open winding or a dead short besides as for high amps current depict during startup - I'd bank check those. Sentinel OUT for electrocution hazards - if you're not trained and equipped be sure to ask for expert help.

P.South.
Also checked breaker and relay, they are also good.

My compressor fan works fine but when the unit is switched on the compressor makes a loud hum for about ii seconds without starting and conitnues to repeat the hum about every 7 seconds.

I think the compressor is locked up only not sure. The capacitor is skilful (tried it on another unit). Besides did ohm exam and it checked out fine. What else tin I exercise to trouble shoot it before I replace it?

After my key air conditioner works a long time to get to the set temperature, when it shits off so restarts when temperature rises the excursion breaker pops

I had a booster installed but did not aid. So this week I installed a super booster simply information technology started the fan but non the compressor. And so I shut off the system for two hours and the compressor worked fine. Now over the weekend I kept the thermostat on 74 so it did not have to work too long at a fourth dimension and it worked fine.

My question is what could exist the problem and how tin I repair it?

When the A/C unit attempts to start, the blower fan on the Compressor Unit starts merely you can hear a Surge of Ability that dims the lights and yous can hear at the surge at the power panel simply the compressor hasn't started. In that location may be as many every bit 5 or 6 surges with 10-15 2d pauses betwixt them and and then the compressor kicks in.

Our A/C Tech checked the system and said it's numbers are all with in the limits of normal performance .
The Surge Of Power trying to start the compressor can't exist normal. Non only am I concerned with the A/C Compressor damage but my power bill with all the surges.
Any suggestions welcome..

What amp breaker do you employ for à 4 ton air-conditioning unit of measurement?

Thank you!

You could be seeing a voltage drop across the wire - unremarkably the electrician looks at the anticipated current depict or circuit amapacity requirement and the length of wire run and finds the NEC tabular array that suggests at what length to go to a larger wire size. I'd also suggest a very careful bank check of the connections themselves. For example a corroded aluminum wire connection could be problem.

Question about a long run. We have a 5 ton unit (8 years old). Bought the house from the builder. Unit is regularly serviced, simply it has always had starting pull that you can "feel" in the house. The unit has a hard kickoff capacitor, which appears to be working.

The electrical run to the unit is long, however. It'south virtually lxxx' from the breaker to the unit. I'yard wondering if a larger wire may help the start? Curious near my options! The "buzz" and dim lights when the unit of measurement starts (again, did this from twenty-four hours 1) would be dainty to solve! Appreciate the time you all take to answer questions like this.

Cristie

Regarding "how long can the unit stay on trying to reach set temp" the reply is ... information technology depends. It depends on quite a few variables such as

- the outside temperature

- the inside temperature

- the rate of estrus gain of the building, sun exposure, weather, direction orientation of walls

- the Ready temperature of the thermostat

- the capacity, design, of the cooling system

- the cleanliness of the air filter

- the presence or absence of duct defects such as crimps, or crushed ductwork or air leak

Since some of these variables are different from hour to hour and day to day - weather - and others vary by homo activeness - thermostat settings - nosotros can't expect at that place to be a standard number of minutes or hours that a cooling system will stay "on" trying to reach the set temperature. In fact if we make the prepare temperature depression enough the cooling system will run forever without reaching it.

A more helpful question to inquire is: does your organisation seem to be working differently than it used to - taking weather changes into consideration? and is there adept air catamenia at supply registers and is that air cool?

I did slightly curve a few cooling fins only I stock-still them dorsum to normal but what else I need to know is b4 I cleaned dust off the evp , could dust have gotten sucked through cooling fins and clogged something? I know the outside drain hole isn't plugged up so maybe some other area?

I know it ran great a twelvemonth ago new with 95+ degrees outside & now it doesn't get as cool equally it should and my Primary question was/is how long can the unit stay on trying to achieve set temp I recall it cycled more frequent than before I cleaned evp... I don't want to blow my window unit ..any assist, PLEASE

Christie the equipment should be able to run as you describe.

And while there may be more to your question than was evident, if dust was removed from the evaporator coil that's good, helpful, and not harmful - let's hope no one bent or crushed the cooling fins.

Will grit covering the evp coils but and then sucked out cause a problem fo the window unit?

Is it ok for my window unit to run with cold air without taking a break fifty-fifty though the desired temp isn't reached.

When I get-go bought unit information technology seemed to cycle off & on and now when on coldest setting it isn't cutting off is this going to break the unit does information technology have to cutting off (the compressor) I guess or is it ok to keep running hours or until desired temp is achieved delight tell me

Thank y'all!!!! You saved me a lot of trouble and expense with your article on the capacitors and all the other excellent information

Cheers again

Outdoor A/C unit. Temps in the high ninety's. Plant compressor running, but fan stopped.

Found desperately corroded connection between condenser fan and capacitor. Female connector was burned and barely in contact. Wire charred for about 1/2" at connector. Removed burned stop of wire, scraped the copper, replaced connector. Unit of measurement ran usually until the next mean solar day.

At present starts commonly, but 20 to 30 minutes subsequently,the condenser fan shuts off. Feels hot from mounting point. Compressor nevertheless running. Close system off for 30 minutes. Echo, unit of measurement starts usually etc. When running, the inlet line is cold and dews normally.

Cleaned all contacts on capacitor. No alter. Fan runs until the example temperature is around 130 degrees, and so shuts down. Fan case temperature then climbs to 146 degrees earlier first to cool.

Tried to bank check capacitor. In checking resistance, got no reading. And then put voltmeter across terminals and registered a declining voltage. Capacitor MAY be okay.

Checked voltage. Ran 240V from T1 to T2, 108 to 112V from capacitor to T2.

Still non sure what the problem is, but starting to doubtable the fan a bit more.

if compressor and the fan motor do not come on what tin can exist the problem

ColdShot,

If the system runs for ten minutes and stops, information technology could be overheating - maybe a failing motor; information technology'southward common to endeavour swapping in a start/run cap first though.

I take been having issues with my outdoor A/C unit of measurement. It will get-go, but afterward five to 10 minutes the motor just stops turning and it but hums and it starts blowing warm air through the ducts. What practice you think may be incorrect with it, is it a bad capacitor or relay or what? Thanks for any assist.

Thanks very much for the advise!

John,

Sometimes when mechanically disturbing an appliance gets it running nosotros trace the trouble to a bad first relay or contactor, or to a loose electrical connection. I'd as the service tech to check the system'southward operation for those or some other difficulty.

Amanda, you demand to as your HVAC service visitor to send out an experienced service tech. The problem may be a difficult starting motor - or something else, we can't tell from your email.

Hello, Appreciate any help; At the beginning of each summer I have to blindside the side of my York compressor to go it started.

The fan blades outset spinning and the compressor kicks in immediately after I blindside it with my hand. I'chiliad banging the area where the capacitor and wires (switch?) reside. The unit is nine years former. Whatever idea what function(s) may be bad?
Thanks very much!!

whatever assistance will be really appriciated.. ive been having many issues with my air this twelvemonth which is aggravating since the unit is only 3yrs sometime..

first i had a issue with information technology non cooling and i had a tech out he said my coils needed clean so i had that washed and information technology worked adept for 2 weeks now it struggles to keep up it never gets every bit cool as what the thermostat is set to if i have it attack 72 information technology will get to 74 but not whatever lower, now in the late afternoon or early on evening the outside unit of measurement turns off (furnace notwithstanding running)

i check the breaker and its never tripped but the only mode i can get it to come dorsum on is if i plow the billow off for a minute and plow information technology back on. the beginning time i did that information technology came correct dorsum on but the 2nd and third fourth dimension i had to do it a few times before information technology would come on.. the pressures accept been checked and they seem to be what they are suppose to be.

i have a child with medical problems and she cant be in the oestrus, and im lost on what to do my granddaddy was a repair human yrs agone merely with things being more "updated"

and hes not familar with a/c with heat pumps now he doesnt know where or what to practise and with my finances being tight he doesnt wanna cost me money i dont accept replacing things that dont need replaced..thank you for whatever advice

NB

Except when the service tech is diagnosing and fixing a problem, there is just a little elementary almanac service/inspection that is needed for the outside compressor/condenser unit. Inspect the unit of measurement for physical damage such as smashed cooling fins, droppings blocking the cooling fins on the condensing coil, obstructions sticking into the unit of measurement, trash and debris or shrubs around or close to the unit that might obstruct air menses or interfere with fan operation.

A more subtle inspection bespeak involves noticing oil deposits on the refrigerant line service ports - indicating a refrigerant leak.

Other defects such every bit loose components show up as sounds or noises.

Nevertheless other defects that demand repair include signs of loose or burned wires, lost refrigerant piping insulation, unit out of level.

HOW Oft IS THE OUT-DOOR COMPRESSOR-CONDENSER Unit IS TO BE SERVICED

Tim, you have already done the difficult office of this diagnosis.

Dimming lights can indicate that an electrical device is drawing high current - which in the case you describe may be the compressor motor trying to commencement. The cycling is considering it tries, overheats, stops on thermal reset, cools off and tries over again;

The burned wire y'all found at the capacitor may hateful that (if you are lucky) just the capacitor has failed - replacing information technology may go that motor running once more. Just if the compressor motor itself has seized, replacing the capacitor will bear witness that the motor still tin't start.

"BURNED-OUT COMPRESSOR" discusses how we diagnose a burned out compressor.

(Found in Alphabetize to RELATED Articles at our Go on reading suggestions at the end of this article)

and at "CAPACITORS for Hard STARTING MOTORS" we hash out troubleshooting the outset/run capacitor.

Spotter OUT: if you are non trained and lack expertise, you can exist shocked or killed (or kickoff a burn down) working on electric equipment.

Afterward I noticed my central air wasn't cooling I turned it off for awhile and tried to re-start, I noticed that every 20- xxx seconds my lights would dim a little as if a large electric draw then release. I turned the system off and began researching this site ( an excellent service I might add).

I took the cover off the unit out side and immediately noticed the scarlet wire connected to my capacitor was just resting on the final as information technology was completely burned and charred. Did I get lucky and find the problem or do you think this is a symptom of a different issue.

Thanks Ronald for the very squeamish comments. We work hard to make our data useful, accurate, unbiased. So reader feedback, including questions, comments, and polite debate, are very helpful.

Thank you Anthony, your views are helpful, though I'yard not sure we concur; a burnt upwardly wire could be caused by a variety of problems, even a nick and short excursion, only more probable by overheating due to overcurrent due to a problem in a relay or in the compressor motor itself. A burning upwards wire to a compressor is less likely to damage the compressor than vice versa.

I want to Thank You lot for posting this wonderful info....I was able to follow your instructions and get my Air-conditioning up and running..!!!

To those who are attempting to D.Y.I...make certain your circuits are off ..!! I am a Residential Remodeler by merchandise and am well versed in working with electrical and I still checked and double checked that everything was off earlier working...Good Luck..!!!

I am an E.E. The comments above regarding the "Could be" is right, in fact I would say information technology's probable a burnt wire acquired the comp to fail. Greater than xc% probablilty based on the outline of events. Yet, a lot of what was described to a higher place regarding motor start upwards in the respond is misleading, and somewhat incorrect.

My central air conditioning unit has been giving me trouble for a few years now.

Sometimes, when you plow it on at the thermostat it works, and sometimes it doesn't. If it does work, it ordinarily quits before it should. A fan or something is still going, just the cooling role that makes the louder noise exterior quits running. Sometimes, you lot tin can manipulate the jump thing at the thermostat past pulling it dorsum and letting it go and information technology will start. Do y'all know what the problem could exist? Thanks.

Samy,

I'm agape the respond is a definite ... maybe. For example if the compressor was slugged with backlog liquid refrigerant it could accept been internally damaged.

Likewise, and this is not quite an "excess" of refrigerant gas, on some, at least older refrigeration systems, if someone switched the elecrical ability on and off also chop-chop or as well often, the compressor could find itself trying to re-first against a high head pressure - with difficuly.

Whereas normal on-off (less frequent) cycling on and off of the compressor gave the gas force per unit area fourth dimension to equalize betwixt the high and depression sides of the system, reducing head pressure and giving the compressor an easier re-start.

Finally, a clog or blocked refrigerant line that slows or does not let the high pressure side drain down and equalize when the compressor is off volition also brand the compressor hard-starting.

could an excess of the coolant gas cause hard start upwardly problem ?

Mel I call back there is no need nor reason to install an extra starting time capacitor when the present 1 is working fairly.

The addition of a hard showtime capacitor kit makes sense if your existing capacitor has failed, OR if yous are trying to squeeze a flake more apply out of a failing hard-starting compressor motor.

My reasoning is that if we exclude a motor that is difficult starting because the capacitor is bad (just replace the capacitor) and so other reasons for difficult starting motors are not innate to the capacitor but to other causes that won't be avoided past the capacitor.

Comments welcome.

Should a "Hard-Start Kit" be installed on an air conditioner when no bug arise? Will installing one foreclose bug and volition the a/c unit last longer if installed?

HOW MANY YEARS THE LIFE Bridge OF A CAPACITOR OR WHAT IS Cause THE CAPACITOR Volition BUSTED

DanJoeFriedman, thanks for your advice...I requested a more experience tech, who was able to locate some lose wiring that has seemed to fix the trouble...All best, Peter

TX Blood-red: slow pressure equalization when the compressor is OFF indeed suggests a blockage that needs to be institute and fixed; perhaps at a drier/filter or at a thermostatic expansion valve or cap tube.

Dan F: information technology sounds as if your compressor is non starting. You demand a service call. Possibly a hard first capacitor kit will assistance merely I'd like to see some diagnosis first.

Chandra: dorsum in Sept you described what sounds to me similar an overcurrent due to a seized motor. What did your service tech find and exercise?

Hullo DanJoeFriedman, my four months erstwhile AC is having starting problem every bit i told yous previously, i observed that when the compressor starts for the first time its take ii to iii tries to become commencement and so works fine even after its thermostat gets satisfy information technology starts again fine. what could exist the reason of ii to 3 tries to get commencement 1st fourth dimension?

my breaker never triped and its compressor never stop working while running it stops only when i finish it or its desired temperature reached. cooling is also fine no icing etc. i am concerned virtually its compressor only is it fine coz its new and in warranty.

When set up to cool, my a/c makes a humming noise for near 30 seconds before quitting and not blowing anything. What tin I do?

...non exactly sure what a compressor get-go relay is. Is it wired into the compressor itself, or is it located in the control box amid capacitors, terminals, etc?

If its contacts were burned or otherwise damaged, wouldn't the solution be to supercede the relay rather than install a difficult start kit? I watched the intallation of the hard start kit and am pretty sure he just confirmed that the compressor was drawing too much amperage at start upwardly and therefore required the kit.

He attributed the loftier start upwards draw to boring force per unit area equalization somewhere betwixt evaporator, condensor, compressor(??) Non sure specifically where or how the uneven force per unit area was creating a problem.

Please too provide cost if there is any trouble or repair requires, thanks again!

My cranium fan or blower makes huge sound and excursion breaker trips off when I first my Air-conditioning. I bought the new dwelling three years back and we utilize AC very less as we prefer outside air. Delight share your experiences or let me know if yous know the problem or resolved the like trouble. Thank you!

Your thesis is reasonable but not, IMHO, absolutely proven past events.

A compressor start relay (or most other switches) that are loosely wired will typically feel arcing at the loose connection (an event that can, by the way, when the excursion is active or the switch closed, depict college amps than normal due to the resistance at the point of arcing and corrosion.)

I've posted our conversation in this article in the Q&A just above the Comments Box section.

Cheers, Dan. I didn't communicate the timeline very well in my original post.

In 2009 tech # one had come up to answer to my problem of a 4-yr-sometime compressor kicking the circuit breaker. Without even looking at the connections in the shut-off box adjacent to the unit, he went straight into control panel, checked compressor current draw at start-up and installed a difficult-start kit. I thought information technology odd that a compressor less than v years one-time would be cartoon too much electric current.

Had no problems in 2010 but final calendar month the circuit billow started kicking off again late in the 24-hour interval. Tech #1 returned, checked coolant pressures and return temp, added some freon and started to pack upward.

I asked if he wasn't going to check the current draws. He reluctantly removed the control cover, checked describe and voltages and pronounced the unit was running perfectly before leaving with my $168 check. When the excursion breaker kicked off again the next solar day, I started to suspect the breaker might be worn out.

Called an electrician a few days afterwards. He replaced the breaker switch, once again without checking the connections at the shut-off box, and inside eight hours my compressor had died - coils shorted to footing - confirmed by tech # one who quoted me a cost to supersede the unit.

Now I chosen a contractor I knew request if he knew any good AC techs. He referred me to tech # 2 who, in my first phone call, was immediately suspicious that my original problem may have been in the wiring, not the unit. His reasoning was that a compressor less than v years old shouldn't accept been giving me problems to brainstorm with.

He came over to confimr my compressor was shorted out.

He so did what no other tech had done since I owned the business firm - popped the cover off the close-off box and tightened the leads at the terminals - black wire loose, white wire "very loose." My question is whether that may have been my problem all along and would a hard-outset kit have temporarily releved the symptom -tripped circuit breaker- without curing the problem.

Josh a bad capacitor can cause revresopreation, Ty replacing the start-run cap

My (indoor) fan motor studders and goes back and forth in forrad and reverse. It finally starts turning in the right management only it doesent have full power, and then it eventually dies down to a boring creep and begins to brand a lite humming noise..

I call up it may be the Dual Capacitor... Could anyone assistance me with this trouble, any communication will exist profoundly appreciated...

Julius:
An HVAC compressor that does not produce whatever pressure sounds as if it's broken internally. I'd ask for a bank check by an HVACR technician

Byran: information technology sounds as if you have a difficult-starting compressor - it may be at terminate of life but often it'southward worth request an HVAC tech to try an hard-start capacitor kit.

My compressor runs simply does not pump ( pressures remain equalized) it eventually shuts off and and then runs again only with the aforementioned results. Doe you know what is causing this?

Compressor will not get-go. Fan runs, air handler fine. When I pulled the outside (fuse? the electrical plug on outside wall that disconnects the electric input) and then push it back it, the compressor begins to commencement, for a 2nd, then stops. The superlative of the compressor/condenser unit stays warm, steam comes off of information technology when water squirted on it.

Scott, did yous await at the HVAC noise diagnostics kickoff at NOISY AIR CONDITIONER / Rut PUMP (Found in Index to RELATED ARTICLES at our Go on reading suggestions at the cease of this article)
There nosotros hash out bustling and buzzing noises and possible sources. Yous need to get-go by being sure you have traced the sound to a specific piece of equipment; then look at motors, capacitors, relays equally we draw in the commodity.

2nd Request...My Central Air unit (Carrier) makes a buzzing/humming dissonance briefly when it starts. Kind of similar a transformer winding noise. It is not heard at the compressor unit. The fan circuit has also been ruled out by disconnecting the compressor circuit and starting the furnace fan, etc. Any suggestions??

Clare I dubiousness anyone tin even guess at a diagnosis of what's incorrect with your system with so little information, but information technology'southward reasonable to ask the service company to return and effigy out what happened. Let us know what yous're told.

Peter, talk with the HVACR service manager before having anyone sent out again. Politely inquire him to send someone with much feel and training and then that y'all don't keep repeating service calls. It may seem profitable to the service company to keep returning, but I doubt they want a bad reputation.

Would anyone know what these guys could have done to my unit. Accept never had problems just had it serviced once a yr.

I had our air units serviced yesterday and now one unit of measurement's fan will not run ?

a few months agone my condenser began shutting downwardly before it would reach its ready temperature... had service in who replaced a circuit board afterwards much deliberating and I think a capacitor...It worked perfectly for a few day through a stretch of 100+ days...and so it returned to its previous behavior..

.I didn't use the arrangement and checked for a once or twice a week to run across if the rest had washed some practiced...

Most four weeks from the last time it worked properly, I tried it again during another 100+ degrees spell and it worked like a gnaw again...consistently lowering the internal temperature nearly xxx degrees from the outside..

.This lasted for almost 4-5 weeks and three days agone returned again to it previous bad functioning..

.I have had service twice and am gettng prepare to make another call...

Any thoughts? Many thank you, Peter

fabled info. thanks

Stanley typically when the compressor/condenser shuts off and won't operate for several hours it's a sign that a motor is overheating and being turned off by a safety switch. Often thermal overload switches on electrical equipment will automagically reset themselves in one case the equipment has cooled down.

If it'southward your exterior compressor/condenser unit of measurement that's switching off you lot can ostend that it's overheating by gently cooling the system downwards with a garden hose (it is designed to tolerate rainfall, for example).

If your unit has blocked airflow due to shrubs or something else or if its condensing coil or fan are blocked by droppings (similar grass clippings) it may be possible for a homeowner to ready that condition past cleaning or hosing off the equipment or cutting back shrubs besides close to the unit.

In any other case you need an HVAC tech to diagnose and fix the cause of overheating.

Air conditioner starts however subsequently about v hours the exterior unit of measurement shuts off and and so won't come back on for several hours.

Sam provided the new capacitor is properly selected and wired up, it'south fourth dimension to have some tests of the motor itself, its start and run windings, to see if it's usable.

Other diagnostics tin rule out a trouble, for instance with the thermostatic expansion valve or a refrigerant system clog that was causing overpressure and the motor to get off on reset.

On 8-6-11 a a/c repairman put a hard start kit on my unit of measurement, later on the unit finish cooling. He
came back and restarted the compresser, over again a few hours after it stop cooling. What to do at this point, please advise me.

how much for replacement the motor of air conditioner ,

tripping circuit breaker means overcurrent ways a motor that either cannot start or is seized.

My condensor trips my circuit billow, the compressor fans starts but not the compressor(Nor does information technology hum). When I attempt to short the capicitor at that place is no spark. Is it possible that the capacitor is to arraign or more unfortunate, the compressor?

I recollect the thing to practise is accept out the motor and examination it stand up-lone.
I'd recall your tech would also bank check

- proper wiring connections

- proper voltage (not depression voltage)

- that the motor ratings and wiring connections lucifer the actual voltage (some motors can be wired for 120 5 OR 240V)

- that there is no binding in motor mountain or drive - if the motor were not properly mounted, or if the fan it's trying to spin has seized bearings or a crooked, bent shaft, the motor may exist unable to turn the blower shaft - that's a reason for testing the motor out of the unit.

If all of those expect proficient it must be a local wiring or control board problem. But the bustling sure sounds like a bad motor, capacitor, or low voltage.

even if we just put a brand new motor and capacitor in it? could it be anything else?

Amy y'all may accept a bad fan motor, bad start relay, or command lath.

the unit comes on hummms calorie-free air flow...fan not turning. replaced fan motor and capacitor. does the exact same thing! lite air flow hummm but fan not turning! assistance!

Thank you for the nice note Ms. Ruiz. We publish information in some depth on most building topics. Among problem diagnosis and repair steps, in that location are many that are well inside the scope of most homeowners or occupants, but of form other steps crave expertise and special equipment.

Fifty-fifty in the latter case the more you know nigh the general approach to solving or preventing building troubles the better yous can sympathise what's being proposed or done by your contractor.
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Thank you so much for this info. I am trying to familiarize myself in how hvac works. Information technology hcosts and so much for any service phone call. Non to mention the labor and parts. I am glad that this info. is free for ane to just read and take notes. to know-how and what to look for.

Chris short cycling A/C compressors combined with that loud startup dissonance sounds like the system is shutting off on thermal reset. I can't say if it's a bad relay, control, or motor, but you need a service call.

My A/C unit simply started turning on and off very ofttimes.

The unit of measurement starts, making a loud noise at offset, runs for well-nigh twenty seconds or so, then shuts down. This is a continuous wheel. The arrangement is about 10 years erstwhile, and I have non been running it very hard, with the temp set at 85 degrees. Any clues as to what the problem is?

Anna what's recommended - a hard kickoff kit - for your compressor motor - sounds like a reasonable thing to try in that it's much less costly than replacing the A/C arrangement. If your mobile dwelling house park has inadequate power service to the whole customs you might meet that equally depression voltage (that tin can be measured or even monitored) or peradventure dimming lights.

Sometimes my air conditioning will come on and sometimes, information technology volition non. I was told the problem is because I live in a older mobile home park that tin not handle the corporeality of power needed for the 105 residences to run ac units on a hot twenty-four hour period. I was told I should accept a hard start installed on my air conditioning. Information technology is a Rheem 2.v that is approx. 10 yrs old. Does this seem logical?

Christopher:

To get a functional transfer of heat from the condensing coil to outside air nosotros need at least 15 degf. temperature divergence.

When the weather is extremely hot exterior it might exist that for some systems the ambient air temperature is getting close plenty to the temperature of the high force per unit area high temperature gas exiting the compressor (and entering the condenser coil) that the system has diminished cooling capacity. Temporarily cooling down the whole exterior arrangement increases the system efficiency just only briefly.

Make certain your compressor has good air flow, not blocked by a building, plants, etc; some folks try calculation shade over the unit of measurement; If it continues to overheat I'd inquire for an opinion from an experienced local service tech.

Bob: the manner virtually capacitor kits piece of work they are intended to be added on to the existing wiring in parallel. A second capacitor wouldn't harm the compressor so much equally proceed a failing compressor limping along a bit longer before information technology seized up for practiced.

My air conditioner compressor runs fine till it gets actually hot outside, about 3:30 I accept to get out the hose and spray off the lines and so it volition get-go and run all dark. Any Ideas what is wrong the unit of measurement is just 6 years quondam and has always done this.

there are ii hard start kits on my air conditioner. I know that there should just be one merely some tech installed a second one a few years back and didnt remove the showtime one. My question is would having ii hard start kits cause a compressor to go bad.

Brent: RE: One of the connections on my compressor has literally burned upward. I replaced the cable/connexion and cleaned the lead on the compressor but the compressor however doesnt come on"

a burned upwards electrical wire connection at an air conditioning compressor tin can happen for several reasons but one of them is that the motor is frozen and can't showtime; when the stuck motor tries to starting time it draws high amps and tin over time burn the electrical connexion before the billow trips. Sounds similar you need a service phone call from a trained tech.

Andre: re: "my compressor won't turn on" - if you lot hear the motor trying to offset but information technology'southward not starting you might be able to become the compressor going past having a hard starting capacitor kit installed.

In the article serial

COMPRESSOR & CONDENSING Curlicue, A/C

run into the article titled CAPACITORS for Hard STARTING MOTORS

(Institute in Alphabetize to RELATED Manufactures at our Keep reading suggestions at the end of this article)

Eric: re: "100 caste days accept my compressor shutting down during the hottest part of the twenty-four hours" - your compressor may indeed be at terminate of its life, merely there are some things to check: can you brand certain it'southward got good air flow through the unit, that the compressor is not too shut to the building, blocked by shrubs or trash?

You could also effort temporarily shading the unit with a beach umbrella to see if that makes a difference and extends its life.

I live in Texas and lately the countless 100 degree days accept my compressor shutting down during the hottest part of the twenty-four hours. If I spray cold water it comes back on and runs the rest of the day. The Ac Tech says I need a whole new unit. What's your take on this.

my fan run but my compressor won't turn on ....i hear it tryin to bound on simply it wont..what do i do for this trouble

One of the connections on my compressor has literally burned upward. I replaced the cablevision/connexion and cleaned the lead on the compressor but the compressor yet doesnt come on. Whatever ideas?

Brenda: re: "i have changed the breaker the capacitor switch and it sparks when i turned the breaker on "

This sounds Dangerous - go out the equipment off until it's checked past a trained HVAC tech or a licensed electrician. I tin can't say if the failure is in the equipment, wiring, or billow/panel but it sure sounds like a brusk excursion that could start a fire.

Craig:
Yep, it could exist a bad start / run capacitor - and that's less plush than replacing a bad fan motor and so I'd try that. Can you lot spin the fan blades hands (with power off) ? If then the motor is not seized upwardly fully (yet)

I accept a blower fan that will non proceed to run...It volition start to rev up than it's like the voltage drops and it slows that stops ?... can this be a first Capacitor problem?

i accept inverse the billow the capacitor switch and it sparks when i turned the breaker on

Grant: that question is beyond my expertise - I'll practice some research on starting capacitor options and will study back hither.

Lonny, did you cheque the excursion breaker at the principal panel?

Provided that you are trained and know how to safely make basic electrical checks, if you lot have power at the master console, then shut off power there (on the circuit to your compressor unit) and bank check the continuity of the wiring and wiring connections.

Lookout out for fatal electrocution hazards!!

Had a compressor not getting ability,change the circuit breaker still not getting ability to the unit of measurement

i accept been asvised that on a hvac run capacitor, 370volt tin can be replaced with a 440 volt(45+five uf) and that compressor will but draw power that is needed and extra bachelor voltage wont crusade a malfunction..is this right?

Yeah, a starter capacitor can fail without bulging. If in doubt information technology'southward often an inexpensive diagnostic test to simply swap in a new ane.

If a starting time capacitor goes bad, can information technology simply get weak or will it almost probable bulge out?

...

Continue reading at Difficult STARTING COMPRESSOR MOTORS or select a topic from the closely-related articles below, or see the consummate Article Index.

Or run into Hard STARTING COMPRESSOR MOTOR FAQs-ii - more-contempo questions & answers about HVAC or heat pump compressor motor starting problem

Or run into these

Recommended Articles

• COMPRESSOR / CONDENSER REPAIR - home
  • BURNED-OUT COMPRESSOR
  • CAPACITORS for HARD STARTING MOTORS
  • COMPRESSOR / CONDENSER DIAGNOSTICS
  • COMPRESSOR / CONDENSER INSPECTION CHECKLIST
  • COMPRESSOR MOTOR REPLACEMENT
  • CONTACTOR RELAY DIAGNOSIS & REPAIR
  • Command CIRCUIT Lath, A/C
  • CRANKCASE HEATERS
  • FAN, COMPRESSOR / CONDENSER UNIT
  • Hard STARTING COMPRESSOR MOTORS
  • MOTOR OVERLOAD RESET SWITCH
  • NOISES, HVAC Organisation DIAGNOSIS - dwelling house
  • REFRIGERANT FLOODBACK, LIQUID SLUGGING
  • TIGHT or SEIZED Air-conditioning COMPRESSORS
• ELECTRIC MOTOR DIAGNOSTIC GUIDE tests to diagnose electric motors

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