With Heater

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.
^ Refer to "Insufficient Heating of Passenger Compartment," further down is this article.

Inoperative Blower

1. Blown Fuse.
^ Replace fuse.
2. Open circuit.
^ Check the circuit between the ignition switch and the blower motor, and the blower motor ground circuit. Repair as necessary.
3. Faulty blower switch.
^ A faulty blower switch should be replaced.

Insufficient Heat

Check duct work for proper installation and check for obstructions. Check blower operation. Inspect temperature lever and temperature motor for proper installation and operation.

Insufficient Heating of Passenger Compartment

1. Incorrect operation of controls.
^ The driver should be advised of proper operation of controls.
2. Low engine coolant level.
^ Coolant should be added as needed. A check should be made for coolant leaks. The engine should be run to clear any air locks.
3. Faulty engine thermostat.
^ The thermostat should be checked and replaced if necessary.
4. Chinked heater hose.
^ Hoses should be checked and kinks should be straightened or hoses replaced as necessary.
5. Obstructed heater core tubes.
^ An obstruction usually causes a squishing noise in the core. Any foreign material should be removed from the core or the core should be replaced.
6. Faulty blower motor or blower circuit.
^ Faulty wires or connections must be repaired or replaced. A faulty blower motor must be replaced.

Insufficient Heating of Rear Seat Area

1. Incorrect operation of controls.
^ The driver should be advised to use high blower speed to force air to the rear of the passenger compartment.
2. Obstruction on the floor.
^ A check should be made for bulky objects or torn insulation under the front seat.

Cold Drafts on the Floor

1. Partially open air inlet valve.
^ The air inlet valve should close properly in all modes except "MAX" air conditioning mode. Repairs should be made as necessary.
2. Side door seals damaged or missing.
^ All door seals should be inspected. Faulty seals should be repaired or replaced as necessary.