Replacement of the HVAC Air Filter

sd plus mm 83.02.001

The HVAC air filter must be replaced every six months or 60,000 miles (97 000 km) to permit proper operation of the HVAC system.

  1. Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
  2. Remove the lower HVAC cover in the cab. See  of the 108SD Plus and 114SD Plus Workshop Manual for instructions.
  3. Disconnect the wiring harness from the evaporator probe.
  4. Remove the capscrews that attach the evaporator service cover to the HVAC assembly. Remove the evaporator service cover.
  5. Pull the filter out of the HVAC assembly.
  6. Install a new filter in the HVAC assembly. Be sure that the arrow on the filter is pointing toward the evaporator. See Fig..

    1. Evaporator

    2. Filter

    Fig. 1, HVAC Assembly Filter

  7. Remove the condensate seal from the evaporator service cover and install a new condensate seal on the cover.
  8. Using capscrews, attach the evaporator service cover to the HVAC assembly.
  9. Connect the wiring harness to the evaporator probe.
  10. Attach the lower HVAC cover to the dash panel. See  of the 108SD Plus and 114SD Plus Workshop Manual for instructions.
  11. Remove the chocks from the tires.
Note:
Parent topic: Heater and Air Conditioner
Document Number: 0000120651
Manual Publication Date: 2024-06-03
Topic Publication Date: 2024-10-31