Cabin AC Noise Diagnosis
The AC system is producing an unusual noise inside the cabin, likely due to a failing blower motor, debris in the blower fan, or a worn AC compressor. The noise occurs only when the AC is on, indicating the issue is related to the HVAC system.
Diagnosis Details
Possible Causes
Blower motor bearing failure or debris in the blower fan cage causing rattling or whining noise.
AC compressor clutch or bearing issue, especially if noise changes with compressor engagement.
Expansion valve or refrigerant line vibration causing a hissing or knocking sound.
Related OBD-II Codes
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What You Should Do
Inspect the cabin air filter for debris, then check the blower motor for foreign objects or bearing wear.
If noise persists, have a technician evaluate the AC compressor and refrigerant system.
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.
