Test 5: No Temperature Control From Front Control Panel

Operate engine until coolant is at normal operating temperature. Go to next step.
Check front A/C-heater unit air mix linkage, crank, shaft and cable for lubrication, damage and proper installation. Repair or replace as necessary. After repair, go to step 8 . If no problem is found, go to next step.
Check air mix cable for correct installation and adjustment. Reinstall and/or adjust air mix cable. See AIR MIX CABLE under ADJUSTMENTS. After repair, go to step 8 . If no problem is found, go to next step.
Check A/C-heater unit for the following:
- Bevel Gear Set Properly Engaged
- Air Mix Cable Properly Engaged And Adjusted
- Air Mix Cable Damaged Or Deformed
If no problem is found, go to next step. If problem is found, repair or replace as necessary. After repair, go to step 8 .
Check front A/C-heater unit for any foreign material obstruction limiting movement of air mix door. Remove obstruction. After repair, go to step 8 . If no problem is found, go to next step.
Check front A/C-heater unit air mix door for damage or improper installation. Repair air mix door as necessary. After repair, go to step 8 . If no problem is found, go to next step.
Check all heater hoses, pipes and connections for leakage, looseness or damage. Repair or replace as necessary. After repair, go to next step. If no problems are found, A/C-heater operation is normal. Recheck A/C-heater system malfunction symptoms.
Operate A/C-heater system to verify repair. If A/C-heater unit operates properly in every temperature setting, repair is complete. If A/C-heater unit does not operate properly in every temperature setting, recheck malfunction symptoms and return to step 1 .