Weak A/C Airflow with Bad Odor
The A/C system is producing weak airflow and a bad smell, likely due to a clogged or dirty cabin air filter, or a failing blower motor. The odor suggests mold or debris buildup in the evaporator case.
Diagnosis Details
Possible Causes
Clogged cabin air filter restricting airflow and trapping moisture/mold
Blower motor resistor or blower motor failure causing low fan speed
Mold or debris buildup on the evaporator coil causing odor and blockage
Low refrigerant charge (less likely with weak airflow but possible if system is icing)
Related OBD-II Codes
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What You Should Do
Replace the cabin air filter first.
If airflow improves but odor persists, use an A/C evaporator cleaner.
If airflow remains weak, test the blower motor and resistor.
Check for refrigerant leaks if icing is suspected.
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.
