| Description |

Repair procedures Removal 1. Switch "OFF" the ignition and disconnect the negative (-) battery terminal. 2.
Description and operation Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling. Repair procedures Inspection 1.
Description and operation Description The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of the heater core. The PTC heater is an electric heater using a PTC element as an auxiliary heating device that supplements deficiency of interior heat source in highly effective diesel engi