Intermittent Weak A/C Airflow with Odor
The A/C system in your 2020 Ford F-150 has intermittent weak airflow and a bad smell. This is often due to a clogged cabin air filter, a failing blower motor resistor, or mold growth in the evaporator case. The issue comes and goes, suggesting an electrical or airflow obstruction problem rather than a refrigerant leak.
Diagnosis Details
Possible Causes
Clogged or dirty cabin air filter restricting airflow and causing musty odors
Failing blower motor resistor or blower motor causing intermittent fan speed
Mold or debris buildup in the evaporator case causing bad smell and reduced airflow
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 case for mold and clean with an A/C coil cleaner.
If airflow is still weak or intermittent, test the blower motor resistor and blower motor for proper operation.
Check for any debris blocking the intake or vents.
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.
