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07-24-2012, 11:35 AM #1
Compressor Contactor with shorted coil
Hello, I have a 20 ton water source heat pump that is two stage. Today is the second day in a row that I've come in to find the second stage contactor has a shorted coil. The unit tries to run and the fan will come on, the first stage compressor will come on, and after the one minute time delay when the second stage compressor tries to run, the direct short momentarily cuts out the transformer and then the Honeywell stat goes into it's three minute time delay and then the cycle starts all over again.
I replaced the contactor yesterday and everything seemed to run good for the rest of the day but i had the same problem today when I came in. Any ideas or advice?