The Right Thermostat? (Honeywell says two diffrerent things)
I have a Rheem RGDA-100C-ER natural gas furnace, with a dual fuel kit (now running propane) and a CP-84R AC/heat pump. I'm in central Ohio, so it runs as a heat pump almost all winter with propane emergency/aux heat kicking in on a few cold days (and a/c in summer of course).
I tried to swap out the old thermostat for a Honeywell RTH7600, which is what Honeywell recommended.
The old thermostat has:
X, W2, R, G, O, Y, E, B.
The wiring diagram on the furnace control board has:
R, Y, B, O, W2, E, G, C (W2 and E are jumpered together).
The new thermostat:
Rc, R, O/B, Y, G, C, L, E, Aux.
The new one expects an L, and says I could run X to two places, but both already have wires in them (C that now has old B, and E). The instructions say panic!
Is there some way to use this thermostat, or is it going back to the store?