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 Diagnostic procedures. With HVAC System - Manual
3. To avoid misdiagnosis check that coolant ratio is correct and heater hose lines are not frozen.