Subaru Outback 2020 AC Not Cold with Musty Smell
The AC system is blowing warm air and emitting a musty odor, likely due to a clogged evaporator drain or a dirty cabin air filter causing moisture buildup and mold growth.
Diagnosis Details
Possible Causes
Clogged evaporator drain tube preventing condensation from draining, leading to moisture accumulation and mold/mildew growth.
Dirty or saturated cabin air filter restricting airflow and trapping moisture and contaminants.
Low refrigerant charge due to a leak, reducing cooling performance and allowing humidity to build up.
Related OBD-II Codes
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What You Should Do
Inspect and replace the cabin air filter.
Check the evaporator drain tube for clogs and clear if necessary.
If the AC still isn't cold, have the refrigerant level and system pressure checked by a professional.
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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.
