Hello,

I have recently purchased a new Honeywell thermostat (RTH6350) for my heat pump, and need assistance in the wiring. The current thermostat is a Trane (XR401) unit. The existing wiring configuration is as follows:

Terminal to Wire Color:
R - Red
W2 - Black
W1 - White
Y - Yellow
G - Green
O - Orange
B - Blue

The terminals on the new Honeywell thermostat are as follows:
L, E, Aux, G, O/B, Y, R, Rc (w/ R and Rc having a jumper)

My understand of the configuration for the new thermostat would be as follows:
R/Rc - Red
Y - Yellow
O/B - Orange
G - Green
Aux - ? (black or white)
E - ? (black or white)
L - not used
- blue not used

Is the above configuration correct? And how are the black and white wires configured?

Thanks,

Ted