Temperature Control

If the heater outlet air temperature cannot be adjusted with the temperature control knob(s) on the heater-A/C control panel, the following could require service:
- The heater-A/C control.
- The blend-air door motor(s).
- The wire harness circuits for the heater-A/C control or the blend air door motor(s).
- The blend-air door(s).
- Improper engine coolant temperature.