AC Not Cold and Bad Smell
The air conditioning starts cold but quickly becomes warm, accompanied by a bad smell. This indicates a potential refrigerant leak, a failing compressor, or a clogged evaporator causing moisture and mold growth.
Diagnosis Details
Possible Causes
Low refrigerant level due to a leak, causing the AC to blow cold initially then warm as pressure drops.
Faulty AC compressor clutch or internal failure, leading to intermittent cooling.
Clogged or dirty evaporator core with mold/bacteria growth, causing bad smell and reduced cooling.
Related OBD-II Codes
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What You Should Do
Inspect refrigerant pressure with a manifold gauge set; check for leaks using UV dye or electronic leak detector.
If low, repair leak and recharge.
If compressor is cycling erratically, test clutch and compressor function.
For bad smell, clean evaporator with a foaming cleaner and replace cabin air filter.
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.
