Question about Honeywell Programmable Thermostat Heater
I replaced a honeywell CT70 thermostat with a honeywell rth3100c. My wiring from the old stat was: X= blue, W2= white, R=red, G= green, O=orange, Y1=yellow, and E=brown. My new stat has E, Aux, Y, G, O, L, R, B, and C. I hooked up the new one E=brown,Aux=white,Y=yellow, G=green, O=orange, R=red, and B=blue. The AC worked fine but when the heat is turned on the fan comes on right away and the heat doesn't shut off automatically. Any ideas on what I did wrong?
I would not connect the X (blue wire) to the B terminal. I would connect the X (blue wire) to C. Attaching X to C is actually "Optional" if your thermostat has batteries, and I know the RTH3100C does have batteries. You could just tape it off. The other wires are on correctly.I hope this works for you.
Posted on Jan 03, 2013
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Posted on Jan 02, 2017
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