Intermittent Weak AC Airflow with Odor
The AC system has weak, intermittent airflow and a bad smell, likely due to a clogged cabin air filter or a failing blower motor resistor. The odor suggests microbial growth on the evaporator.
Diagnosis Details
Possible Causes
Clogged cabin air filter restricting airflow and trapping moisture/debris causing odor
Failing blower motor resistor causing intermittent fan speed issues
Evaporator core with mold/bacteria growth producing musty smell
Blower motor motor brushes wearing out or electrical connection intermittent
Related OBD-II Codes
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What You Should Do
Replace the cabin air filter first.
If odor persists, use an AC evaporator cleaner.
If airflow still intermittent, test blower motor resistor and blower motor.
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.
