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During an electrical storm my unit experience a power surge that caused my step down transformer to burn. Replaced step down transformer and check my voltage without thermostat connected. The compressor unit does not come on and my condenser unit only hums. What else could I be over looking outside of purchasing a new one.

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Chances are that if your Air Conditioner was the recipient of a high voltage transient that took out your transformer, that same transient could very well have smoked any number of other components in the control system. It may not be worth investing any more $$$ and time to troubleshoot and replace components at this point. If by chance you had a reasonable selection of replacement components that you could cycle in it and test, you might have a shot... otherwise.. I would write it off... ( your call..and probably not what you wanted to hear but merely my humble opinion)..

Posted on Aug 20, 2008

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