Garage door opener operates, but the door jerks or shudders at the start or end of travel.

Safety first: Disconnect power and secure the door before tightening hardware.

Steps to smooth operation:

• 1. Tighten door hardware: Check all hinge screws, roller bracket bolts, and the top and bottom fixtures. Tighten any loose fasteners.
• 2. Adjust limits: Reduce up and down travel slightly so the door does not slam into the floor or header stops.
• 3. Check arm angle: With the door closed, the opener arm should be angled slightly back toward the opener, not straight or forward. Adjust the arm length or bracket position if needed.
• 4. Lubricate hinges and rollers: Apply lubricant to reduce stick-slip motion.