Please Wait. For heat pumps I run thermostat wire which is available here. Kevin on November 22, at In heat pump system, there are at least 8 wires that need to be connected to the thermostat for proper operation. There are several factors to be considered such as what is the desired primary heat source that you want and what is the most economical way to control everything among a few other factors. The G terminal is connected to the indoor fan which circulates the air in the room. Here are the air conditioners frequently asked questions and answers.
You could be right about your assumption with the way it is wired.
Thermostat Wiring for Dummies
RH The RH terminal is the volt heating power supply. The Basic heat pump wiring for a heat pump thermostat is illustrated here. This will ensure a quality connection point and allow the device to function properly and effectively. Always follow manufacturers instructions for both the thermostat and the HVAC system. If you are not sure, always refer to the operating manual of your thermostat in your house before attempting to do any trouble shooting or replacement work.