Thermostat Installation Help (8 wire)

Old 06-17-18, 02:29 PM
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Post Thermostat Installation Help (8 wire)

Hello Experts,

Need some much needed wiring assistance for replacement of thermostat. My outdoor unit(s) are Carrier brand; thermostat(s) being replaced is Carrier as well. My current wiring on old thermostat is the following;
White -- W/W1
Green -- G
Red -- RC
Yellow -- Y/Y2
Blue -- C
Orange -- O/W2/B
Black -- OAT
Brown -- SRTN

New thermostat is a Honeywell RTH6500 (wifi series). Wiring terminals are the following;
* Conventional -- K, Y2, W2, G, W, C, Y, R, RC (will not operate without wire to C)
* Heat Pump -- K, L, Aux/E, G, O/B, C, Y, R, RC

Any ideas on how to wire this new thermostat is greatly appreciate -- thanks!
Old 06-17-18, 05:17 PM
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The new thermostat wires like this...
White -- Aux/E
Green -- G
Red -- RC
Yellow -- Y
Blue -- C
Orange -- O/B
Black -- tape off
Brown -- tape off

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