Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Air Conditioning Trouble Shooting
1994 Saab 9000 CD, StandardSECTION Air Conditioning Trouble Shooting
WARNING:
This is GENERAL
information. This article is not intended to be specific to any unique situation or individual vehicle configuration. The purpose of this Trouble Shooting information is to provide a list of common causes to problem symptoms. For model-specific Trouble Shooting, refer to SUBJECT, DIAGNOSTIC, or TESTING articles available in the section(s) you are accessing.
BASIC AIR CONDITIONING TROUBLE SHOOTING CHART
| CONDITION | POSSIBLE CAUSE |
|---|---|
| Compressor Not Working | Compressor clutch circuit open. |
| ..... | Compressor clutch coil inoperative. |
| ..... | Poor clutch ground connection. |
| ..... | Fan belts loose. |
| ..... | Thermostatic switch inoperative. |
| ..... | Thermostatic switch not adjusted. |
| ..... | Ambient temperature switch open. |
| ..... | Superheat fuse blown. |
| Excessive Noise or Vibration | Missing or loose mounting bolts. |
| ..... | Bad idler pulley bearings. |
| ..... | Fan belts not tightened correctly. |
| ..... | Compressor clutch contacting body. |
| ..... | Excessive system pressure. |
| ..... | Compressor oil level low. |
| ..... | Damaged clutch bearings. |
| ..... | Damaged reed valves. |
| ..... | Damaged compressor. |
| Insufficient or No Cooling; Compressor Working | Expansion valve inoperative. |
| ..... | Heater control valve stuck open. |
| ..... | Low system pressure. |
| ..... | Blocked condenser fins. |
| ..... | Blocked evaporator fins. |
| ..... | Vacuum system leak. |
| ..... | Vacuum motors inoperative. |
| ..... | Control cables improperly adjusted. |
| ..... | Restricted air inlet. |
| ..... | Mode doors binding. |
| ..... | Blower motor inoperative. |
| ..... | Temperature above system capacity. |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.