A/C Not Cold and Smells Bad - Subaru Outback 2020
The air conditioning 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 slow leak (e.g., at compressor shaft seal, condenser, or O-rings). The system cools initially but loses pressure as it runs.
Faulty A/C compressor clutch or internal failure causing intermittent operation. The smell may be from burning oil or refrigerant oil.
Clogged or dirty evaporator core with mold/bacteria growth, causing bad smell and reduced cooling efficiency.
Related OBD-II Codes
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What You Should Do
Have the A/C system inspected by a certified technician.
They should check refrigerant pressure, look for leaks with UV dye, test compressor operation, and clean or replace the cabin air filter and evaporator if mold is present.
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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.
