Intermittent Weak A/C Airflow with Bad Odor
The A/C system in your 2020 Jeep Wrangler is blowing weak, intermittent airflow accompanied by a bad smell. This typically points to a clogged or dirty evaporator core, a failing blower motor resistor, or a cabin air filter issue. The intermittent nature suggests 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 causing intermittent fan speeds
Mold or debris buildup on the evaporator core producing bad smell and reduced airflow
Blower motor failure or loose electrical connection
Related OBD-II Codes
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What You Should Do
Start by replacing the cabin air filter (located behind the glove box).
If the smell persists, inspect the evaporator drain for clogs and consider an A/C system cleaning.
Test the blower motor resistor by checking fan speeds at all settings; if intermittent, replace the resistor.
If airflow remains weak, have a professional check the blower motor and electrical connections.
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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.
