Keeprite outdoor unit is very loud, with rattling or buzzing noises during operation.

Safety first: Turn off power at the disconnect before reaching into the unit.

• Step 1 – Inspect fan area: Remove the top grille if needed and check for sticks, leaves, or other debris contacting the fan blade.
• Step 2 – Tighten hardware: Tighten fan blade set screw on the motor shaft and any loose panel screws.
• Step 3 – Check motor bearings: Spin the fan blade by hand; if it feels rough or wobbly, the motor bearings are failing and the motor should be replaced.
• Step 4 – Secure lines: Look for refrigerant lines touching the cabinet and add foam insulation or clamps to prevent vibration noise.
• Step 5 – Compressor noise: Some compressor noise is normal, but loud knocking or metal-on-metal sounds indicate internal damage and require professional evaluation.