Coolant Temperature Sensor / Switch HVAC: Locations

Engine 104:

The A/C engine coolant temperature sensor (B10/8) is located on the thermostat housing.

Engine 111:

The A/C engine coolant temperature sensor (B10/8) is located on the thermostat housing at the front of the cylinder head.

Illustration: Engine 604/605:

The A/C engine coolant temperature sensor (B10/8) is located at the front left on the cylinder head in the vicinity of the fuel filter.