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Home >> Jeep >> 1997 >> Grand Cherokee 4WD L6-4.0L VIN S >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Component Tests and General Diagnostics >> Non-Trouble Code Procedures >> Heating System Diagnosis >> Temperature Control
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Temperature Control


Temperature Reference Chart:





If temperature cannot be adjusted with the TEMP knob on the control panel, the following could require service:

Blend Air Door Actuator Drive Circuit:




- Blend-air door circuit.
- Improper engine coolant temperature.

Under "Cooling System" Symptom Related Diagnostic Procedures

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