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Unit runs but compressor will not start no power at the compressor or capasitor

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Check for power at the contactor. If no power there, check the circuit breaker, disconnect, or fuses. If there is power at the contactor, set the thermostat to call for a/c then check the contactor to see if it is pulled in. If it isn't check for 24vac at the contactor. If no 24vac then go to the thermostat and place a jumper between R and Y; that should make the contactor pull in if everything is good. If it does pull in when you install the jumper the problem is your thermostat. Let me know what you find.

Posted on Aug 06, 2010


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Will not start

its most likely the capasitor in the outside unit get a new 60 pharret there are 3 wires that go to it 1 is for run and one is for start they go to the compressor chck that the comp kiks after changing

Nov 08, 2010 | Heating & Cooling

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Is about the 5hp haier thermo cool floor standing unit,the indoor starts but when the compressor in the outdoor wants to start the power on the indoor blinks,whiles the outdoor PC board light also...

Test the capasitor in the compressor unit there it could be bad or the compressor froze up.
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Compressor wont turn on. fan runs central unit

first check you thermostat settings and make sure that it is on a cooling setting if ok it can be the fuse that sends the power to the outside unit if fuse is ok it can be the capasitor for the compressor if ok you may have to check the compressor for open windings or ground fault so you will have to replace the compressor or the relay which is after the thermostat

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I have a 33 gallon craftsman compressor model #919.167330. If the air is totally out of the compressor and you plug it in, it will build to full pressure and then turn off normally. When you begin to use...

i think you will find there is nothing wrong with the compressor part of this its all down to a faulty motor
if it cant start up the motor the motor will hum at first then the circuit braker pops out? yes???
check your getting full mains power first as if its trying to run on a very long extenshion lead its not getting the full power to start up, and you will need a much heaver lead,,,if its in a plug on the wall, change the capasitor on the motor,,,this is the part that hold a lot of volts to kick start the motor over when it first trys to start,,if this capasitor has droped in holding its charge there wont be enough volts in it to kick start the motor over,,so the motor starts to hum first trying to start but it dont stand a chance of spinning up
so it keeps pulling more and more amps till the braker pops out,,,watch this capasitor it can realy bite you if you tuch the two ends that are live????
the motor has two windings in it,,a start up winding and a running winding,, if its been humming for some time now it could have damaged the start up winding

Mar 28, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Amana side by side. compressor sometimes won't start, overloads and cycles that way until you unplug the unit for an hour. After that it usually starts and runs. Bill


Jan 13, 2010 | Amana 22.6 cu. ft. Side-By-Side...

1 Answer

My unit is not working right everytime I turn it on the lights inside flicker and it blows the breaker

sounds like the compressor or the fan is burnt out
or could be as simple as a start up reley
go out side and have the wife turn on the unit look inside and see what hapens if the fan works the it's the compressor or compressor start up capasitor

Jul 30, 2009 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Home unit 3 ton won't run

The small capacitor is for the fan motor the other for thecompresor .You can try conecting a booster (or hot start) in paralel to the comp.capacitor .If this doesnt work you have to replace the compresor.

Mar 29, 2009 | Heating & Cooling

1 Answer

Intertherm 3 ton ac unit I took the capasitor off to get a new one and forgot how to wire it it is not on the cover three wire fan and compressor three prong 55-5 capasitor help

The 55 terminal is marked "herm" it goes to the start winding of the compressor. The 5 terminal is marked "fan" it goes to a wire from the fan motor. The common terminal goes to one side of the power line...The side that is NOT going directly to the compressor.

Jul 27, 2008 | Intertherm Heating & Cooling

1 Answer

Hi the compressor on my split air conditioning unit will not cut in .the indoor unit runs and the compressor light on the indoor unit lights up?

If the system is appearing to turn on, but no compressor, Check the capasitor on the condensor unit. If you open the service panel, you can test the compressor by pushing in the contact switch. If you push the switch and all comes on, Replace the thermostat after checking to make sure the thermostat wires are not cut or disconnected. The capasitor usually looks like it is swelling if it has gone bad

Jul 21, 2008 | Haier Heating & Cooling

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