12-18-2021 01:52 PM
Does it matter where we connect the yellow wire to either of the Y1 or Y2 for a heat pump set up?
12-18-2021 03:10 PM
Yes it does matter, y1/y2 Are generally for two stage heating and cooling systems I have a York heat pump that is two stage, if you have a single stage system y1 is what you want