heat cool thermostat wiring diagram

See the diagram below for what each wire. Search Button Toggle.

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Thermostat Wiring Guide 3 RH RC Z W2 W C Y Y2 G OB Diagram of conTrol wire connecTions.

. Diagram of conTrol wire connecTions for 2-wire heaT-only conTrol wires plus c wire RH RC Z W2 W C Y Y2 G OB Diagram of conTrol wire connecTions for 3-wire heaT-only conTrol wires plus c wire R wire heat power W wire heat R wire heat power W wire heat G wire fan. Are You Ready for the 3G Sunset. Skip to main content.

For instance for a gas furnace to turn on the heat the thermostat internally connects the R terminal power to the W terminal heat stage 1 to turn on the furnace. Look at the list of wiring configurations by system type below.

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