Garage door opener vibrates excessively, causing the opener head and rail to shake.

Safety first: Use a sturdy ladder and have a helper if needed when working overhead.

• Tighten mounting hardware: Check all lag screws and bolts securing the Craftsman opener to the ceiling and header. Tighten any loose fasteners.
• Add vibration isolators: Install rubber vibration isolation pads or straps between the opener and mounting brackets if not already present.
• Inspect rail alignment: Ensure the rail is straight and aligned with the center of the door. A bent rail can cause binding and vibration.
• Check door balance: Disconnect the opener and move the door by hand. If it is heavy or jerky, have a professional adjust springs and hardware.
• Reduce chain slap: Adjust chain tension to minimize slapping against the rail during operation.