To defog inside windshield

1. Select any fan speed except "0" position.
2. Select desired temperature.
3. Select the
or
position.
4. The outside (fresh) air will be selected automatically.
If the outside (fresh) air position is not selected automatically, press the corresponding button manually.
To defrost outside windshield

1. Set the fan speed to the highest (extreme right) position.
2. Set the temperature to the highest (HI) position.
3. Select the
position.
4. The outside (fresh) air will be selected automatically.
WARNING - Windshield heating Do not use the ( ) or ( ) position during cooling operation in extremely humid weather. The difference between the temperature of the outside air and the windshield could cause the outer surface of the windshield to fog up, causing loss of visibility.
To defog inside windshield 1. Select desired fan speed. 2. Select desired temperature. 3. Press the defroster button ( ). 4. The outside (fresh) air position will be selected automatically.
Description and operation Description The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of 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 engine.
Repair procedures Inspection 1. Turn the ignition switch ON. 2. Manually operate the control switch and measure the voltage of blower motor. 3. Select the control switch to raise voltage until high speed.