Dehumidifier is excessively noisy during operation; rattling, buzzing, or grinding sounds.

Safety first: Unplug the unit before tightening or adjusting any components.

Steps to reduce noise:

• Check placement: Ensure the dehumidifier is on a solid, level surface. Avoid hollow or resonant platforms.
• Inspect fan assembly: Remove grilles and check that the fan blade or blower wheel is securely fastened to the motor shaft. Tighten set screws or clips as needed.
• Look for loose parts: Tighten any loose screws on cabinet panels, handle, or control panel. Add foam padding where the bucket contacts the frame if it rattles.
• Examine motor and compressor mounts: Inspect rubber grommets under the compressor and fan motor. Replace if cracked or missing to reduce vibration transfer.
• Replace noisy motor: If the fan motor emits a grinding or high-pitched squeal, replace the fan motor assembly.

Note: Some compressor hum is normal, but loud knocking or metallic sounds may indicate internal compressor damage requiring professional service.