Spectacular Furnace Wiring Color Code
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Industry standard for geothermal heat pumps.
Furnace wiring color code. It terminates at the air handler or furnace. The orange wire connects to terminal o on your thermostat. It s important to note that in some cases the color of the wire does not necessarily mean it connects to that came color one the board.
The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. Thermostat wiring and wire color chart thermostat wiring colors code. The green wire underneath your thermostat connects to the fan of your furnace or air handler.
This thermostat wire color code will help homeowners understand the anatomy of their thermostat. The green wire connects to terminal g on your thermostat. It terminates in your outdoor condenser for reversing valve operation from hot to cold.
It is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. Furnace thermostat wiring color code standard pdf the thermostat wire color code you need to know each thermostat wire has a different color which signals its function. R the r terminal is the power.
Lastly if you have a package unit then the. For this reason kill the power at the condenser and the air handler before changing or working on the wiring at the t stat.
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