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What to Do When the Blower Makes Abnormal Noises?

1 Answers

StJoanna

07/29/25 3:46am

The solution to abnormal noises from the blower is to remove foreign objects and troubleshoot the issue. There are generally three scenarios of blower noise, with specific solutions as follows: Noise changes with airflow volume: This situation is most likely caused by foreign objects inside the blower, and removing them should resolve the issue. If the noise persists after cleaning, it's necessary to disassemble the blower to inspect the specific cause of the fault. Resonance noise from airflow in the ducts: Turn off the air conditioning compressor, turn on the blower, and adjust the airflow volume and direction. Foreign objects in the air ducts or motor failure: First, turn off the air conditioning compressor, turn on the blower, and adjust the airflow volume and direction. If the noise changes or diminishes accordingly, it indicates foreign objects in the air ducts. If not, and the noise only occurs when adjusting the airflow volume and direction, it is likely a motor failure or other issues. Open the engine compartment for a detailed inspection and proceed with disassembly and repair as needed.

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