AC Not Cold with Musty Smell
The air conditioning system is not producing cold air and emits a musty odor when turned on. This typically indicates a refrigerant issue combined with microbial growth in the evaporator core or cabin air filter.
Diagnosis Details
Possible Causes
Clogged or dirty cabin air filter restricting airflow and causing musty smell
Evaporator core mold or mildew buildup due to moisture
Low refrigerant level due to a leak, reducing cooling performance
Faulty AC compressor or expansion valve
Related OBD-II Codes
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What You Should Do
Replace the cabin air filter first.
If smell persists, have the evaporator coil cleaned and the AC system inspected for refrigerant leaks.
Recharge refrigerant if low.
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.
