AC Not Cold and Bad Smell in Traffic
The air conditioning works well at highway speeds but fails to cool effectively in stop-and-go traffic, accompanied by a bad smell. This suggests a potential issue with the refrigerant system, compressor, or evaporator, possibly related to low refrigerant or a failing compressor. The smell may indicate mold or debris in the evaporator.
Diagnosis Details
Possible Causes
Low refrigerant charge due to a small leak, causing reduced cooling at low RPMs
Failing or intermittent AC compressor clutch or electric compressor issue
Clogged or dirty evaporator causing bad smell and reduced airflow
Faulty expansion valve or orifice tube restricting refrigerant flow
Related OBD-II Codes
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What You Should Do
Have the AC system inspected by a qualified technician.
Check refrigerant pressure and look for leaks.
Clean or replace the cabin air filter and evaporator if mold is present.
Test compressor operation and electrical connections.
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.
