Troubleshooting Hints - Air Delivery & Temperature Controls

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS
1. Check condition of HTR A/C Fuse (FUSE 6). If fuse is blown, locate and repair source of overload. Replace fuse.
2. If fuse is not blown, proceed with following diagnostic procedures.
3. To avoid misdiagnosis, check that coolant ratio is correct and heater hose lines are not frozen.