Question about Carrier 38CKC042 Air Conditioner

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Outside unit will not operate

A few days ago I noticed a loud squeeling sound coming from the unit when the AC was running. I turned it off because I was pretty sure something was wrong. Now, when I turn the AC on I can hear the unit make a humming noise when I stand next to it. I've reset the circuit breakers and they didn't fix the problem. If I run the fan inside the house the humming is not present. Any suggestions or ideas would be greatly appreciated.

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  • Keith M Jun 10, 2008

    Well I rent the house I'm currently in so I was curious about maybe an easy quick solution to solve the problem without having to call up the landlord. I guess I'll go ahead and give them a call.
    Thanks for the information.

  • Keith M Jun 12, 2008

    After doing some more research I believe the capacitor is bad. The condensor will run but when it's time for the fan to run that's when I hear the loud noise and the fan doesn't move. Can you tell me where I could purchase this hard start kit and how much they are ?

  • Delll Jun 17, 2008

    I also noticed a loud squeeling sound coming from the AC unit when the AC was running yesterday. Not sure when it started but had turned it on about 1 hour before i heard the noise. Never heard that noise before. I also turned the AC off because it sound like something was wrong. Now, when I turn the AC on I can hear what sounds like the compressor running but fan is not spinning and then the squeeling sound starts. While off, i can spin the fan. If it's a capacitor problem where is it located and is it and easy inexpensive fix. I also reset the circuit breakers and they didn't fix the problem. Any other help would be appreciated. Thanks



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Sounds like a bad fan motor. Inside fan runs, compressor runs. Outside fan. Are your contactors pulled in when thermostat set on cool? If not might be a contactor. If contactor not pulled in touch the top of it with the end of a screwdriver. If fan spins turn unit off a buy a contactor...

Tip: Always make sure power at disconnect is off

Posted on Jun 23, 2008

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Sounds like your compressor has frozen up or is not getting the required voltage to run. One option might be to install what is called a hard start kit which is a capacitor. If this does not fix your problem most likley your condenser will need replaced. Another thing might be an overcharged system which could happen as the temperature has increased outside. Unfortunatly this will probably already have caused damage to the compressor. Please comment if you need further assistance.

Posted on Jun 10, 2008

  • burzerko
    burzerko Jun 14, 2008

    you may purchase these kits from a Johnstone supply or grainger supply or even maybe a local HVAC warehouse in your area.



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