Important: Review the system operation in order to familiarize yourself with the system functions. Refer to
Manual HVAC Description and Operation
Visual/Physical Inspection
| • | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
| • | Verify the A/C compressor clutch turns freely and is not seized. |
| • | The A/C compressor will not operate in cold outside air temperatures. |
| • | The following conditions may cause window fogging: |
| - | Blocked A/C evaporator drain tube |
| - | Maximum passenger capacity |
| - | Blocked body pressure relief valves |
| • | Inspect the air distribution system for causes of reduced air flow: |
| - | Obstructed or dirty passenger compartment air filter, if equipped |
| - | Blocked or damaged air inlet or outlet vents |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to
Testing for Intermittent Conditions and Poor Connections.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
