Old Version Thermostat Controller (grey)

Please be aware that if you purchase this, you will likely receive communication from our parts & service department to ensure this device is compatible with your unit before we can guarantee shipment.  If you are attempting to replace a faulty controller, it's possible it could actually be more due to the wiring harness than a bad controller. This controller also needs to have specific firmware version compatibility with the ECU inside the heater it is to be paired with.  Requires 4-pin square white harness connector.