Musty Smell After Rain in 2020 Nissan Rogue
A musty odor after rain typically indicates moisture intrusion, often from clogged A/C drain tubes, wet cabin air filter, or water leaks in the HVAC system. This can lead to mold and mildew growth, affecting air quality and potentially causing respiratory issues.
Diagnosis Details
Possible Causes
Clogged A/C evaporator drain tube causing water to pool in the HVAC case
Wet or contaminated cabin air filter due to moisture ingress
Water leak from sunroof drains, door seals, or windshield seal allowing moisture into the cabin
Mold or mildew growth in the evaporator core or ductwork
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What You Should Do
Check and clear the A/C evaporator drain tube (often located under the vehicle near the firewall).
Inspect and replace the cabin air filter if damp or dirty.
Examine sunroof drains, door seals, and windshield seal for leaks.
If odor persists, consider using an A/C evaporator cleaner or having the HVAC system professionally treated for mold/mildew.
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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.
