00-0AV

Possible Causes

• •Faulty pre-heat switch
• •Faulty glow plug relay
• •Faulty glow plugs
• •Faulty control board
• •Broken or loose wires
• •Run indicator operation failure
• •Incorrect winter door position
• •Evaporator air inlet restriction
• •Condenser air restriction
• •Compressor belt failure
• •Faulty temperature control switch
• •Faulty fan speed switch
• •Faulty system switch
• •Faulty thermistor
• •Faulty fan motor and blower wheel
• •Faulty coolant solenoid valves
• •Faulty temperature control module
• •Faulty compressor clutch relay
• •Faulty compressor clutch

Suggested Actions

1. 1Troubleshoot pre-heat switch
2. 2Troubleshoot glow plug relay
3. 3Troubleshoot glow plugs
4. 4Troubleshoot control board
5. 5Check broken or loose wires
6. 6Check run indicator operation
7. 7Inspect control board
8. 8Check winter door position
9. 9Check air inlet at evaporator for restriction
10. 10Check condenser for air restriction
11. 11Check compressor belt
12. 12Inspect temperature control switch
13. 13Inspect fan speed switch
14. 14Inspect system switch
15. 15Inspect thermistor
16. 16Inspect fan motor and blower wheel
17. 17Inspect coolant solenoid valves
18. 18Inspect temperature control module
19. 19Inspect compressor clutch relay
20. 20Inspect compressor clutch

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