Defogging and Defrosting Using Fresh Air

cen dm 04.01.002
  1. Turn the temperature control switch all the way clockwise for warm air, the fan switch to off and, if equipped, the bunk fan switch to off before starting the engine.
  2. Remove any ice or snow from the outside of the windshield, door windows, and fresh air inlet grille.
  3. With the engine at operating temperature, turn the fan switch to 4, the highest speed. See Fig.. Leave it in this position for 30 seconds. This will clear the system of moist air.

    1. Fan Switch at Highest Speed

    2. Air Selection Switch at Defrost

    3. Temperature Control Switch at Warm

    Fig. 1, Defogging and Defrosting Settings

  4. Move the air selection switch to the defrost (windshield) position. In this position warm, dry air is directed to the windshield.

    Note: The air conditioner, if equipped, is automatically engaged in the defrost mode. This dries the air.

Note:
Parent topic: Water-Valve-Controlled Heater and Air Conditioner System
Document Number: 0000118312
Manual Publication Date: 2024-05-13
Topic Publication Date: 2024-06-06