AC Not Cold and Bad Smell
The air conditioning system is not producing cold air and emits a foul odor. This is likely due to 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 gauge set.
Inspect for visible leaks at hoses, compressor, and condenser.
Replace cabin air filter if dirty.
Use an AC evaporator cleaner to address odor.
If compressor is not engaging, test clutch and relay.
Recharge system if low, but repair leaks first.
Related Repairs
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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.
