Question about Heating & Cooling
R is red, W is white, Y is yellow, and G is green. At the same time, RC is power for cooling, RH is power for heating, a jumper is often placed between the two if the A/C unit uses the same power for both cooling and heating, no jumper if cooling has its own power supply and heating has its own power supply.
W is for heating, warming. This is the signal to the a/c unit to turn heating on.
Y is for cooling, this is the signal to the a/c unit to turn cooling on.
G is the indoor fan, airflow. This is the signal to the a/c unit to turn the on the indoor fan on.
Y, W, and G gets power to signal the a/c from Rc and Rh, as switched by the thermostat. Jumper R to Y and the cooling compressor turns on. Jumper R to G and the fan turns on, etc.
Posted on Apr 07, 2015
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Posted on Jan 02, 2017
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