For 1990-2009 cars only
- Inspect for an obstruction in both of the defroster nozzles.
- Inspect for the proper operation of the defroster air valve.
- Inspect for one of the following conditions.
- Inspect for insufficient heating.
Perform the following steps, as necessary:
| • | Remove any foreign objects. |
| • | Repair any loose instrument panel pad that blocks an outlet. |
Replace the defroster vacuum actuator or hose if one of the following conditions exist:
| • | A faulty defroster air valve vacuum actuator |
| • | A faulty defroster air valve vacuum hose |
Refer to Heating Performance Diagnostic .
