AC Not Cold and Bad Smell
The AC starts cold but then 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
Low refrigerant charge due to a leak (common at seals or condenser)
Failing AC compressor or clutch (intermittent engagement)
Clogged or dirty evaporator with mold/bacteria causing bad smell
Expansion valve or orifice tube blockage
Related OBD-II Codes
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What You Should Do
Check refrigerant pressure with a gauge set.
Inspect for visible leaks (dye test).
If low, recharge and add leak sealant or repair leak.
Replace cabin air filter and clean evaporator with a foaming cleaner if smell persists.
Test compressor clutch operation.
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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.
