What Color Wires Go Where On A Thermostat
Camila Farah

Rc wire connects to the rc terminal.
Rh wire connects to rh terminal. What color wires go to which connections i have a trane heat pump and am replacing the original trane thermostat. This depends greatly on who installed it as well as who manufactured your heating pump. Y wire connects to the y terminal and is for cooling stage 1.
Y2 wire connects to y2 terminal and is for cooling stage 2. Red r power for the thermostat. Rc red wire power 24 vac rh or 4 red wire jumpered power 24 vac w white wire for heating enable y yellow wire for cooling enable g green wire controls fan on auto the diagram shows how the wiring works. I show where the wires go at the thermostat the color code then down at the furnace control board.
The green wire underneath your thermostat connects to the fan of your furnace or air handler. Basic thermostat wiring for furnace and air conditioner. The green wire connects to terminal g on your thermostat. Red wire connects to the r terminal.
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The yellow wires connect to the y terminals on your thermostat. When taking into consideration your thermostat wiring colors the orange wire typically connects to the o terminal while the dark blue wire connects to the b terminal. During installation the wires are connected to one board that sends certain data through each wire to the thermostat. The most essential colors are red green and yellow although you may find up to eight different wires in a heat pump thermostat or as few as five in a more common hot water system.
Therefore here s the color to label diagram for a typical thermostat. Green the green wire connects to the fan. The red wire is connected to terminals beginning with the letter r which include r rh and rc units depending upon how the thermostat is being used. Thermostat wire is made of multiple strands of solid copper wire each wrapped individually with a colored shell and enclosed together inside a protective sheathing.
Yellow the yellow wire connects to your compressor.
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