Garage door reverses before reaching the floor; no visible obstruction.

Safety: Do not over-increase force; always verify safety reversal.

• Inspect door movement: Disconnect opener and move door by hand. Correct any binding or stiffness.
• Lubricate hardware: Lubricate rollers, hinges, and bearings.
• Increase down force slightly: Turn the down force adjustment screw or change electronic setting in small increments, testing after each change.
• Test safety: Perform the 2x4 reversal test to ensure the door still reverses on obstruction.