I have a Trane Air Handler (Model TEM6A0D48H41SAA) with a Honeywell T6
Pro Programmable Thermostat (Model TH6220U2000/U) with the following 7
wires: C, G, Y, O/B, W2, E, R. It is an electric heating and cooling
unit. I don’t know if it has a heat pum...