AC Not Cold and Bad Odor
The air conditioning system is not producing cold air and emits a foul smell. This indicates a potential refrigerant leak, compressor failure, or mold/bacterial growth in the evaporator.
Diagnosis Details
Possible Causes
Low refrigerant level due to a leak in the system (e.g., at seals, hoses, or condenser).
Mold or bacteria buildup in the evaporator core causing the bad smell and reduced cooling efficiency.
Faulty AC compressor or clutch not engaging, preventing refrigerant circulation.
Clogged or dirty cabin air filter restricting airflow and contributing to odor.
Related OBD-II Codes
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What You Should Do
Inspect the cabin air filter and replace if dirty.
Check for visible refrigerant leaks (oily residue) around AC components.
Have a professional perform an AC performance test, check refrigerant pressure, and inspect the compressor clutch operation.
If mold is suspected, use an evaporator cleaner and run the system with recirculation off to dry out the core.
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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.
