Excessive vibration or unit rattles the window or floor during operation.

Steps:

• 1. Check level: Use a level to ensure the unit is installed per Danby instructions (slight tilt to the outside for window units; level for portables).
• 2. Secure mounting: Verify that all window mounting brackets, side curtains, and screws are installed and tight. Add foam strips where the unit contacts the window frame to dampen vibration.
• 3. Floor stability: For portables, place the unit on a solid, flat surface. Avoid soft carpets or uneven floors.
• 4. Fan inspection: Inspect indoor and outdoor fans for bent blades or debris causing imbalance. Replace damaged fan blades or blower wheels.