Do I use R or RC on thermostat?

Asked by Elise Gould

If you have two wires, R or RH will go into the R terminal, and RC will go into the RC terminal. … This wire will go to the G terminal on your new thermostat. For the Y, Y1, and Y2 wires, Y or Y1 will go to the Y terminal, and Y2 will go to the Y2 terminal.

Sarah Taylor, BA Contributor
Sarah Taylor
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