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Mechanic To Mechanic - Compressor Short Cycling??

Posted: Wed Jul 06, 2011 8:17 pm
by DThomas
I have a Armstrong through-the-wall AC and gas furnace. The compressor and condenser fan short cycle and the contactor remains engage. What could be the problem?

- Mechanic To Mechanic - Compressor Short Cycling?

Posted: Wed Jul 06, 2011 11:12 pm
by nomadpeo
what type of mechanic are you ? it helps to know if you are a car mechanic or a hvac mechanic.

this sounds similar to an entry in another category, but the name is different. the answer is the same. if you have a dual capacitor, it is probably the culprit.

- Mechanic To Mechanic - Compressor Short Cycling?

Posted: Mon Aug 01, 2011 7:02 pm
by derrold_d
its not the capacitor. its a pressure switch. they wont come on for a bit then back off because of a cap.

- Mechanic To Mechanic - Compressor Short Cycling?

Posted: Wed Aug 10, 2011 6:19 am
by nomadpeo
a pressure switch would disengage the contactor. if the dual cap is out, each motor could be overloading and trying to run, then opening on internal overload.