Question about Honeywell Heat/Cool Thermostat

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I am trying to install a Honeywell programmable thermostat and am having trouble with the instructions. The old thermostat connections are identified by wire color, six of them, W, O, G, R, C, Y, but the connections to the new thermostat are five in number and identified as Rh, Rc, W, Y, and G. I cannot find any cross reference to tell me what to hook to what. Somehow O, R, and C have to go to Rh and Rc. Thanks

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It sounds like you have a heat pump, o (orange) is usually used to power a reversing valve in your outdoor unit for cooling. But just in case you don't here is a little info Rh-power for the heating circuit, W- completes heating circuit, Y to your outdoor unit for cooling, Rc- power for the cooling circuit, and G power to your high speed fan.

O for your heatpump
C is 24v common for cooling circuit
If you do have a heat pump, you will have to get a thermostat that is compatable with heat pumps. Hope this helps

Posted on Jul 13, 2009

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Posted on Jan 02, 2017

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