AC Not Cold with Bad Smell
The air conditioning system is not producing cold air and emits a foul odor. This typically indicates a refrigerant leak, a failing compressor, or microbial growth in the evaporator.
Diagnosis Details
Possible Causes
Refrigerant leak (low charge) – often accompanied by a musty or sweet smell from leaking refrigerant oil.
Clogged or dirty cabin air filter causing reduced airflow and odor buildup.
Faulty AC compressor or clutch not engaging.
Mold or mildew in the evaporator core – produces a sour, musty smell when AC is on.
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.
If smell persists, perform an evaporator coil cleaning or use an AC disinfectant spray.
If compressor is not engaging, test the clutch relay and pressure switch.
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.
