Hello, I currently have a trane model 3aat80B1A1 thermostat in my home, and would like to change it out for a White Rodgers model 1F78 non programmable digital thermostat, the problem is that the trane unit has,R, T, O, Y, X2, B, W, and U connectors with x2 and u jumped, and the white rodgers unit has W, RH, B, RC, G, O, and Y (no X2, T, or U) and I have no idea what to do from here... HELP the unit is a trane TWN036C100B1