Control Assembly: Description and Operation

Potentio Temperature Control (PTC):

POTENTIO TEMPERATURE CONTROL (PTC)
To allow the driver to control the vehicle interior temperature. The PTC (Potentio Temp Control) inputs to the Auto Amplifier. It can be set at an interval of 0.5°C (1.0°F) through both (HOT) and (COLD) control switches. Setting temperature is digitally displayed.