Inadequate Defrosting

1. Obstruction in defroster nozzle.
^ Defroster nozzle should be inspected. Any foreign objects should be removed. Any loose instrument panel pad that blocks an outlet should be repaired.
2. Faulty defroster air valve vacuum actuator or hose.
^ Defroster air valve operation should be checked. A faulty vacuum actuator or hose should be replaced.
3. Insufficient heat.