Intermittent Weak A/C Airflow with Bad Odor
The A/C system in your 2020 Ford Mustang produces weak airflow that comes and goes, along with a bad smell. This suggests a problem with the blower motor, evaporator, or cabin air filter rather than a refrigerant issue.
Diagnosis Details
Possible Causes
Clogged or dirty cabin air filter restricting airflow and causing musty odors
Blower motor resistor or blower motor failure causing intermittent operation
Mold or mildew buildup on the evaporator coil producing bad smell and reduced airflow
Debris or leaves blocking the fresh air intake or evaporator drain
Related OBD-II Codes
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What You Should Do
Start by replacing the cabin air filter.
If the odor persists, inspect the evaporator drain for clogs and consider using an A/C evaporator cleaner.
If airflow is still weak or intermittent, test the blower motor resistor and blower motor for proper operation.
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.
