RC.600.368 12v dc air conditioner 7813A978/7813A975/AKV200A433J For MITSUBISHI ASX/OUTLANDER/LANCER 2012 WXMS035

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How to Identify a Malfunctioning Automotive A/C Compressor

1.Inadequate Cooling Performance

• The most obvious sign is when the air conditioning system fails to produce cold air or takes significantly longer to cool the cabin than usual. This could indicate the compressor isn't properly compressing refrigerant.

2.Unusual Noises

• Listen for abnormal sounds when the A/C is engaged:
• Loud grinding or rattling noises suggest internal component damage
• Squealing sounds may indicate a failing clutch or belt issue
• Clicking noises when cycling on/off could signal electrical problems

3.Visual Leaks

• Inspect the compressor and surrounding components for:
• Oil stains or wet spots (refrigerant oil leaks)
• Greenish UV dye (if system has been serviced previously)
• Corrosion or physical damage to compressor housing

4.Clutch Engagement Issues

• With the engine running and A/C on maximum:
• The center of the compressor pulley should engage and spin
• Failure to engage suggests electrical or clutch problems
• Intermittent engagement indicates low refrigerant or control issues

5.Excessive Vibration

• Noticeable shaking when the compressor is running may indicate:
• Internal component failure
• Imbalance in the rotating assembly
• Mounting bracket problems

6.Electrical Problems

• Check for:
• Blown fuses related to the A/C system
• Corroded or loose wiring connections
• Proper voltage at the clutch coil (typically 12-14V when engaged)

7.System Pressure Abnormalities

• Professional diagnosis should include:
• Static pressure tests (engine off)
• Running pressure tests (engine on, A/C operating)
• Comparison of high and low side pressures to specifications