Outside Temperature Sensor

The outside temperature sensor is a temperature-sensitive resistor whose resistance varies inversely with temperature. As outside air temperature increases, resistance decreases. As outside air temperature decreases, resistance increases.

The HVAC programmer monitors the outside temperature signal and uses this information to display outside temperature on the heater and A/C control VF display and helps determine command signals.

The outside temperature sensor value can be updated by pressing the "OFF," "AUTO" and "VENT" buttons on the Heater and A/C control assembly at the same time. This function will update outside temperature sensor to the current temperature reading.