Possible Reasons:
- Vibration of internal components (e.g., connecting tube hitting the casing)
- Loose foreign objects (screws or debris) shaking inside the casing
- Wear of high-speed rotating parts of the motor
Solution:
① External Observation
When starting the device, carefully check if the connecting tube is vibrating and hitting the body. Try holding the tube in place to see if the noise changes.
② Shake to Listen
After turning off the device, gently shake it to listen for any rattling sounds from loose internal parts. If present, it indicates loose foreign objects/screws.
③ Noise Localization
Turn the suction to medium-high level and listen in a quiet environment to determine if the noise comes from the front cup lid (resonance) or inside the body (motor abnormal sound).
If the issue cannot be solved still, please escalate to after sales support.