Windows Fog Up When HVAC Blower Is Turned Up (Install Water Preventative Filter in Plenum Area)

Some customers may comment that the windows fog up when the HVAC blower speed is increased.

This condition may be caused by water from the drain hole under the plenum area getting drawn into the HVAC system.

Important: DO NOT replace any HVAC components.

Technicians are to install a water preventative filter in the plenum area using the procedure below.

1. Set the windshield wiper arms so they are not in the park position (half way preferably).
2. Remove the left air inlet grille panel. Refer to Air Inlet Grille Panel Replacement in SI.
3. Remove the plenum water deflector.



4. Assemble the bolt (1), clip (2) and filter (3) as shown.



5. Install the filter and secure the clip (1) as shown.
6. Tighten the bolt.
7. Reinstall the plenum water deflector and the air inlet grille.

For vehicles repaired under warranty, use: