A/C Not Cold and Bad Smell
The A/C starts cold but quickly becomes warm, accompanied by a bad smell. This indicates a refrigerant leak or a failing compressor, with the smell likely from mold or a failing component.
Diagnosis Details
Possible Causes
Low refrigerant charge due to a leak (e.g., at evaporator, condenser, or hoses). The smell could be from refrigerant oil or mold on the evaporator.
Failing A/C compressor clutch or internal failure, causing intermittent cooling and possible burning smell.
Clogged or dirty cabin air filter or evaporator drain, leading to moisture buildup and musty odor.
Related OBD-II Codes
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What You Should Do
Check refrigerant pressure with a manifold gauge set.
Inspect for visible leaks (oily residue) at connections.
Replace cabin air filter if dirty.
Clean evaporator drain if clogged.
If refrigerant is low, repair leak and recharge.
If compressor is faulty, replace it.
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.
