Opener makes grinding or squealing noises during operation.

Safety first: Disconnect power before lubricating or tightening hardware near moving parts.

• Lubricate drive: For chain drives, apply a light garage door chain lubricant. For screw drives, apply the manufacturer-recommended grease sparingly along the screw. Do not over-grease.
• Lubricate door hardware: Apply silicone-based lubricant to rollers (except nylon wheels), hinges, and bearings. Avoid getting lubricant on the tracks.
• Inspect drive gear: Remove the opener cover and inspect the main drive gear for wear. Replace if teeth are worn or missing.
• Tighten hardware: Check and tighten rail mounting bolts, header bracket bolts, and opener mounting straps to reduce vibration noise.