The other day a HVAC tech came out and added length to my outside drain line. I noticed when my heat pump was in heat mode , the outside temperature on the indoor themostat was heating up and not correct.
I found out he had secured to the insulated line pipe that was outside. This was picking extra heat from this pipe. They came back and put inside cabinet which is a lot better but still off about 3 or 4 degrees as it is not in the weather or wind.
Should this outdoor sensor be exposed out in the wind and weather to be more accurate? The only reason I need to be accurate as it controls my last 10k of aux heat when outside temp reachs 20 degrees plus recovery time is based on outside temp.