If The door starts to close, then reverses and the opener light blinks.
Then Photo-eye alignment.
The sensors near the floor are out of line or dirty; a clean and re-aim usually restores normal closing.
Inspection, adjustment, sealing, and section-level repairs.
Repairs
A door in good repair is quiet, closes flat against the floor and stays put wherever you stop it. When one of those three things changes, this is the category to look through for the likely cause and the fix.
Garage Door Safety InspectionYour toddler has discovered the wall button.
Garage Door Tune-UpEvery morning the door announces itself to the whole street: a long metallic squeal as it climbs, a rattle at the top, and a…
Off-Track Garage Door ResetThe door came down fine but with a scraping noise, and now the vertical track on one side is bowed away from the wall.
Garage Door Panel ReplacementAfter an overnight freeze the door stuck to the slab, the opener strained, and something gave.
Garage Door Bottom Seal ReplacementWith the door closed and the lights off, a bright line of daylight runs along the floor from one side to the other.
Garage Door Perimeter WeatherstripEvery time the door closes there is a rubbing squeal along one side, and the flexible fin has folded under itself and torn.
Garage Door Manual Lock RepairIt is a February morning and the key goes only halfway into the garage handle.
Which fix fits?
Tap a situation. The answer opens here.
If The door touches the floor and pops back open.
Then Close-limit adjustment.
The opener thinks it hit something; setting the travel limit correctly stops the bounce.
If The door closes but leaves a gap along the bottom.
Then Bottom seal and limit setting.
A compressed seal or a short travel limit leaves daylight; both are simple to correct. Garage Door Bottom Seal Replacement