Wiring Help


Old 01-15-19, 12:12 PM
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Wiring Help

Going from a Honeywell Focus Pro 5000 (THP5220D 1029) to a Honeywell Programmable (RTH2410B).

What I have in the old is-
white wire- W2
green- G
orange- W
brown- C
yellow- Y
red- R/RC
Blue and black wires not connected

My new thermostat has slots for B, O, G, Y, w/aux, not used, and R/RC

Any help would be much appreciated.
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Old 01-15-19, 12:58 PM
Join Date: Jun 2012
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Likely you have a heat pump so the orange wire is an O and white is aux. New thermostat doesn't use C.

Honeywell support at 1-800-468-1502
Old 01-19-19, 11:15 AM
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Using a programmable thermostat with a heat pump can Increase your electric bill.

Since it is more expensive when the electric heat strips kick in setbacks in heat mode are less efficient.

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