Heat Pump Thermostat Wiring Chart Diagram - HVAC - The following graphics are meant as a guide only. Always follow manufacturers instructions for both the thermostat and the HVAC system. Additional articles on this site concerning thermostats and wiring can help you solve your problem or correctly wire a new thermostat.

Some HVAC manufacturers use other colors for additional control points and it is why we advise you to read the manufacturers instructions. These charts and diagrams only represent the basic system. It is possible your system is equipped with additional HVAC components such as a humidifier or electronic air cleaner. Depending on the manufacturer and the designer of the components will depend on how the additional components are wired or integrated into your system or thermostat.

Heat Pump Thermostat Wire available here.

Heat Pump Thermostat Wiring Chart Diagram

Heat Pump Thermostat Wiring Chart Diagram

The Basic heat pump wiring for a heat pump thermostat is illustrated above. It corresponds with the chart below to explain the thermostat terminal functions. Before uninstalling the old thermostat take a picture of the wiring with your cell phone before removing the wires. This way you have a reference. At the minimum draw a picture of it referencing the wires, wire color and what terminal the wire is attached to what terminal. The photo and the drawing reference can be used later to make sure you wire the new thermostat properly.

Heat Pump Thermostat Wiring Chart Diagram

Heat Pump Thermostat Wiring Chart & Diagram - Single Stage Heat Pump Wiring Diagram

Single Stage Heat Pump Wiring Diagram

Heat Pump Thermostat Wiring Chart

This is for use for heatpumps. You should 100% make sure that you have a heat pump system and not an air conditioner with electric heating strips as it is a common mistake for people to mis-identify their HVAC systems. Make sure you do not make this same mistake others make. Air conditioners are different because the reversing valve and defrost controls are unnecessary.

Additionally, remember the RC/RH jumper is only for a heat pump system that has one transformer. It is possible your system could have two transformers. It is rare but still possible.

You can learn more about thermostats, HVAC control, and browse a selection of thermostats here.

Heat Pump Thermostat Wiring Chart Diagram

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