The older pumps need to be cycled often thru the cold months, but newer ones and systems that have been updated dont require it anymore...from what Ive been told at least. Just pull the plug in the winter I guess, then plug it back in...or like said above, run a short belt (more annoying by effective!) I still think you could figure a way to run a switch, tap it into the wiring on the defrost switch itself then when you push it you can either run the defrost with AC or without.
Matt
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