Question about Ruud UAKA042 Air Conditioner

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When we turn on our central A/C the fan comes on & the compressor comes on for about 10 seconds & quits

We have an older Ruud Central A/C unit. I have replaced the capacitor & it still does the same thing . Fan goes on , Compressor starts( the lights dim when it does) it runs for about 5-10 seconds & the compressor quits, Fan keeps going . Thank you in advance for any hints : )

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Sounds like a compressor problem to me.Have you tried a hard start kit?This increases the starting torque.Put an amprobe around the common wire to the compressor and see the amperage draw is on start up.It sounds to me the compressor is cutting off on the internal overload.This is located inside the compressor on the common winding.There shoud be a tag on the condenser housing that gives you the info on the unit.Look for:FLA-full load amps,which is normal running amps and LRA-locked rotor amps,which tells you if the compressor is locked(bad).This will be a high number.If this is the case the compressor will have to be replaced.If it is an older A/C,I'd replace the condensing unit. And if possible, replace the indoor unit also.You'll be pleased with the results.Hope this helps. Gregg

Posted on May 28, 2009

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