Question about Heating & Cooling
I have 5 wires in the wall (RC, RH,Y,W,G) and only 4 terminals(R,Y,W,G). Manual says to attach RC and RH to corresponding terminals. There are no RC and RH terminals.
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Posted on Jan 02, 2017
SOURCE: I'm trying to install a
If the system worked before with three wires then the fan wire(green) must already be jumped to the Y terminal at the furnace. You should be able to run the red wire to Rh and Rc, run the white wire to W and run the yellow wire to Y on the new thermostat. You will not have control of the fan (ON or AUTO) from the thermostat. R is 24v from the furnace, W is the Heating circuit and Y is the Cooling circuit.
Posted on Jan 01, 2009
rh is power for cooling terminal and rh is power for heating terminal connect red wire to rc or rh and there should be a jumper between rc and rh if not install one all other wires are color coded correctly. now the blue wire is not used.
Posted on Jan 05, 2009
The Rc and Rh should have a jumper wire between them let it in. and hook the red wire to one of them it does not matter which one as they are jumpered. The white wire goes on the "w" terminal and the Blue wire will go on the "G" green terminal to run your fan.
This should get you up and running again!
Posted on Nov 13, 2009
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