Door is very noisy during operation; grinding or rattling sounds from the FAAC opener.

Safety: Disconnect power before tightening hardware or applying lubricant.

• Tighten hardware: Check all rail brackets, header bracket, and opener mounting bolts. Tighten any loose fasteners.
• Lubricate chain: Apply a light garage door chain lubricant to the FAAC drive chain. Wipe off excess to avoid dripping.
• Inspect sprockets and pulleys: Look for sharp, worn teeth on sprockets or wobbling idler pulleys. Replace worn components.
• Check door hardware: Lubricate hinges and metal rollers with a silicone or lithium-based spray (avoid tracks themselves).

Do not use heavy grease on the rail; it attracts dirt and can cause binding.