Weak Airflow with Bad Smell from AC
The AC system is blowing weak air with a foul odor, indicating a likely clogged or dirty cabin air filter and possibly a contaminated evaporator coil. The issue is constant, suggesting a blockage or restriction in the airflow path.
Diagnosis Details
Possible Causes
Clogged cabin air filter restricting airflow and trapping moisture/debris causing bad smell
Mold or mildew buildup on the evaporator coil due to moisture, causing odor and reduced airflow
Blower motor resistor failure or debris in the blower fan reducing fan speed
Related OBD-II Codes
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What You Should Do
Replace the cabin air filter first.
If odor persists, have the evaporator coil cleaned and the HVAC system disinfected.
Check blower motor operation and resistor if airflow remains weak after filter change.
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.
