Question about Heating & Cooling
The power to the outdoor unit comes from the main unit inside where the main controller is in place. the relay drive to the compressor of the outside unit is switched ON from the wall unit. So the main board must be checked to see if the porcesor works and triggers the drive relay, if so the relay contacts or the relay can be faulty.
Wishing you a happy New year.
Posted on Dec 31, 2010
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Posted on Jan 02, 2017
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