1. Weak or No Cooling
Symptoms:
Air from vents is not cold, even at maximum A/C setting.
Cooling takes much longer than usual.
Possible Causes:
Low refrigerant due to leaks.
Compressor clutch failure or internal damage.
2. Unusual Noises
Symptoms:
Grinding, squealing, or rattling noises when A/C is on.
Loud clunking or knocking sounds from the compressor.
Possible Causes:
Worn bearings, damaged pistons, or failing clutch.
Debris in the system or lack of lubrication.
3. A/C Clutch Not Engaging
Symptoms:
Compressor clutch does not spin when A/C is turned on.
Clicking sound but no movement.
Possible Causes:
Electrical issues (fuse, relay, wiring).
Low refrigerant (safety switch prevents engagement).
Failed clutch coil or magnetic clutch.
4. Leaking Refrigerant or Oil
Symptoms:
Oil stains or green/blue dye (from UV leak detector) around the compressor.
Hissing sound (refrigerant leak).
Possible Causes:
Damaged seals, O-rings, or compressor shaft seal.
5. Burning Smell
Symptoms:
Rubber or electrical burning odor when A/C runs.
Possible Causes:
Overheating compressor due to low oil or excessive friction.
Slipping or seized clutch.
6. A/C System Cycling Frequently
Symptoms:
Compressor turns on and off rapidly (short cycling).
Possible Causes:
Low refrigerant charge.
Faulty pressure switch or expansion valve.
7. Visible Damage or Corrosion
Symptoms:
Cracks, rust, or physical damage on the compressor body.
Excessive vibration while running.
Possible Causes:
Age, wear, or impact damage.
