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.
Springs
Torsion and extension springs, lift cables, drums and bearings. When any of these wears, the opener strains and the door becomes unpredictable. We restore the balance so everything else can relax.
Garage Door Roller ReplacementNew springs went in last year and the door balances well, yet it still clicks along the ceiling track like a train over rail…
Garage Door Hinge ReplacementWith the door closed and a flashlight on the inside face, one of the hinges near the edge has a crack running from the screw hole…
Garage Door Track Repair or ReplacementHalfway up, the door lurches and one roller rides onto the lip of the channel.
Garage Door Cable ReplacementThe car bumper kissed the door on the way in.
Torsion Spring ReplacementYou heard a sharp bang from the garage, and now the opener hums for a second and gives up.
Extension Spring ReplacementThe home inspector's report on the house you are buying flags the garage door: extension springs with no safety cable running…
Garage Door Balance AdjustmentOn cold mornings the door barely makes it up.
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