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International Automotive Technicians Network
Re: Home ductless heating ac systems
Posted to Open Discussion Forum on 1/15/2018

That's all true but the other function of the heat strips is for defrost mode. In defrost the unit switches to AC mode to heat the outside coils and melt the accumulated ice, which blocks the air flow thru the outside coil. The heat strips come on to warm the ... Login to read more.