Thermostatic Controls - installing a honeywell pro 3000

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chaosmurker
08-10-09, 02:56 PM
the old thermostat is a trane and it has B W R T Y G O X2, the new one has E AUX Y G O L R B C. How would I wire this up? Thanks!

Jay11J
08-10-09, 08:08 PM
Welcome.

What are we hooking up here? I'm guessing HP with back up. Is the back up gas or electric?

This how it should be hooked up.

Old---New
B to C
W to Aux
R to R/Rc
Y to Y
G to G
O to O/B
X2 to E
T is no longer used.