A/C Not Cold and Bad Smell – Honda Accord 2019
The A/C starts cold but quickly becomes warm, accompanied by a bad smell. This suggests a refrigerant leak or a failing compressor, with the odor likely from mold or a failing component.
Diagnosis Details
Possible Causes
Low refrigerant charge due to a slow leak (e.g., at seals, condenser, or evaporator). The system cools initially then loses capacity.
Faulty A/C compressor (internal leak or clutch failure) causing intermittent cooling and possible burning smell.
Clogged or dirty evaporator core or cabin air filter causing musty odor and reduced airflow.
Expansion valve or orifice tube malfunction leading to improper refrigerant flow.
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 fittings, condenser, compressor).
Replace cabin air filter if dirty.
If low on refrigerant, repair leak and recharge.
If compressor is faulty, replace it and flush the system.
Clean evaporator drain if musty smell persists.
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.
