Musty Odor After Rain in 2020 Ford Mustang
A musty smell after rain typically indicates moisture intrusion into the cabin, often from clogged AC drain tubes, leaking door seals, or a wet cabin air filter. This can lead to mold and mildew growth, affecting air quality and comfort.
Diagnosis Details
Possible Causes
Clogged AC evaporator drain tube causing water to back up into the cabin
Faulty or deteriorated door/window seals allowing water entry
Wet cabin air filter from water intrusion or high humidity
Leaking heater core or coolant residue (sweet smell, not musty)
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What You Should Do
Inspect and clear the AC evaporator drain tube under the vehicle.
Check door and window seals for gaps or damage.
Replace the cabin air filter if damp or moldy.
Dry out carpets and upholstery thoroughly.
If the smell persists, have a professional inspect for hidden leaks.
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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.
