Thermostat Color Code Wiring Diagram. A heat pump system on the other hand has eight or more different thermostat wires. Therefore you will use the following color code for simple thermostat wiring.
The thermostat wiring color code guide from wi fi thermostat reviews. Tuned the targeting for honeywell thermostat wiring color code deleted ad scripts added more related posts links and added tags. Thermostat wiring color code.
The 5 strands of wire provide enough functions for the modern.
Hvac systems with more functions need more wires to communicate to and from the thermostat. The most common is 18 5 5 strand 18 gauge. Hvac systems with more functions need more wires to communicate to and from the thermostat. It is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit.
