Temperature Control

If the heater outlet air temperature cannot be adjusted with the temperature control on the A/C-heater control, the following could require service:

• Inoperative A/C-heater control.
• Inoperative blend door actuator(s).
• Inoperative, obstructed or improperly installed blend-air door.
• Improper engine coolant temperature.
• Inoperative related wiring harness or connectors.