Unit runs but makes loud rattling, buzzing, or grinding noises.

Safety: Unplug the unit before touching moving parts. Beware of sharp metal edges.

Steps:

• 1. Identify noise source: Run the unit briefly with covers on and listen to locate whether the noise is from the front (indoor fan), rear (condenser fan), or base (compressor). Then unplug.
• 2. Check indoor blower: Remove front grille and filter. Inspect the blower wheel for foreign objects and ensure it is firmly attached to the motor shaft. Tighten set screws if present.
• 3. Check outdoor fan: Remove rear cover and inspect the condenser fan blade. Tighten the hub on the motor shaft and remove any debris.
• 4. Tighten hardware: Tighten all accessible mounting screws on the compressor, fan motors, and cabinet panels.
• 5. Motor bearings: If the noise is a persistent grinding or squeal from a fan motor, replace the affected Danby fan motor assembly.