AC Not Cold with Bad Odor
The air conditioning system is not producing cold air and emits a foul smell. This typically indicates a refrigerant leak, a failing compressor, or microbial growth in the evaporator.
Diagnosis Details
Possible Causes
Low refrigerant charge due to a leak (common in older systems or after impact).
Faulty AC compressor or clutch not engaging.
Mold or bacteria buildup in the evaporator core causing bad smell.
Blocked or dirty cabin air filter restricting airflow.
Related OBD-II Codes
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What You Should Do
Check refrigerant pressure with a manifold gauge set.
Inspect for visible leaks (oily residue at fittings, compressor, or condenser).
Replace cabin air filter if dirty.
Use an AC evaporator cleaner to eliminate odor.
If compressor is not engaging, test clutch coil and relay.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
