A/C Not Cold and Bad Odor
The air conditioning starts cold but quickly becomes warm, accompanied by a bad smell. This suggests a refrigerant leak, a failing compressor, or a clogged evaporator with mold growth.
Diagnosis Details
Possible Causes
Refrigerant leak (low charge) causing intermittent cooling and musty odor from moisture in the system
Faulty A/C compressor or clutch not engaging properly
Clogged or moldy evaporator core causing bad smell and reduced airflow
Expansion valve or orifice tube malfunction
Related OBD-II Codes
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What You Should Do
Check refrigerant pressure with a manifold gauge set.
Inspect for visible leaks (dye test).
Replace cabin air filter.
Clean evaporator with A/C coil cleaner.
If compressor fails, replace and flush system.
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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.
