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jenn37
Aug 12, 2008, 04:56 PM
i had a 5 wire honeywell mercury thermostat. I have changed it to a 4 wire programmable thermostat. how do i do that? so that i can have heat and airconditioning.
esquire1
Aug 12, 2008, 05:48 PM
Match the wires from the airhandler to the thermostat R,W,G,&Y. The common "C" will not be used.