Furnace Color Code Thermostat Wiring Diagram. Therefore you will use the following color code for simple thermostat wiring. The diagram below shows how a basic 4 wire thermostat is connected as indicated by the color code chart above.
A honeywell non programmable thd thermostat is a. Thermostat wiring color code. Typically a furnace plus a c hvac system has four or five thermostat wires and a common wire.
This type of wiring will be found in heat only thermostats that do not need a cooling wire or a fan wire.
Only two wires are found described as below. This complete volt thermostat wiring guide covers all thermostat wiring on the furnace using the color code and diagram provided with the thermostat. Thermostat wiring diagrams furnaces. Thermostat wiring color code chart the amount of communication needed between the thermostat and air handler or furnace.
