The following lines were added (+) and removed (-):
== Common HVAC Thermostat Wiring ===== (R) Red - Voltage ===Transformer provided DC voltage=== (G) Green - Blower Fan ===Many thermostats (G) and (Y) terminals are connected together at all times when the fan switch is in the "Auto" mode. === (Y) Yellow - Compressor ===The Air Conditioner. When voltage supplied it activates cooling. On a Heat Pump system it can also activate heat via the heat pump.=== (W) White - Heat ===Activate heat. Heat including gas heat, electric heat, or auxiliary heat on a heat pump.=== (B) Blue - Common (exceptions exist) ===What is called 'common' and is typically not used on modern thermostats. Needed on some electronic thermostats or if the system uses indicator lamps.On some Rheem & Ruud systems it is not 'common'. May be Blue or Orange.