4 Wire Fridge Thermostat Wiring Diagram. A thermostat is designed to control the temperature of a heating or cooling unit in the home. In fridge the supply one wire goes to the ptc relay and other one goes to thermostat from which the 2nd wire goes to compressor.
References for 4 wire thermostat wiring color code. Replacing an outdated four wire thermostat with a newer model that uses two wires is not complicated once you purchase the thermostat from a home and garden shop or hardware store. A wiring diagram is an easy visual representation with the physical connections and physical layout associated with an electrical system or circuit.
We have a 19 year old condo with an old carrier mercury thermostat.
Fridge thermostat wiring diagram source. The diagram below shows how a basic 4 wire thermostat is connected as indicated by the color code chart above. In fridge the supply one wire goes to the ptc relay and other one goes to thermostat from which the 2nd wire goes to compressor. Fridge thermostat wiring diagram source.
