Door vibrates excessively or shakes the structure when opening or closing.

Safety first: Use a stable ladder and avoid working alone when adjusting overhead hardware.

• Secure opener: Check the Nice opener's mounting straps or brackets. Tighten all fasteners and add angle iron bracing if the unit flexes.
• Align tracks: Ensure vertical and horizontal tracks are parallel and plumb. Loosen mounting bolts slightly, adjust, and retighten.
• Replace worn rollers: If rollers wobble or have flat spots, replace them with new, ball‑bearing rollers.
• Add vibration isolation: Install rubber isolation pads between the opener brackets and the building structure if vibration is transmitted into living spaces.