Garage door is very noisy during operation (grinding, squealing, or rattling).

Safety first: Disconnect power and pull the emergency release before working on the door hardware. Do not place fingers between door sections.

Steps to fix:

• Inspect rollers and hinges: Look for worn, cracked, or metal-on-metal rollers. Replace with nylon rollers for quieter operation.
• Lubricate: Apply a silicone or lithium-based garage door lubricant to rollers, hinges, and bearings. Do not over-lubricate the tracks.
• Check chain/belt tension: Adjust tension so there is about 1/4 inch sag at the midpoint for chain, and slight deflection for belt, per Chamberlain specs.
• Tighten hardware: Tighten all track brackets, opener mounting brackets, and rail bolts.