Quick answer: A garage door that starts down and then reverses is almost always one of two things: the safety sensors (dirty, misaligned or damaged wire) or, on an older opener, a failing logic board. Both are fixed the same day across Minneapolis-St. Paul, typically $75-$200. Call or text (763) 265-7671, 24/7.
You press the button, the door starts down, stops, and goes right back up – sometimes with the opener light blinking. It happens most at night and in winter, and it is the most common “my door will not close” call David gets. The good news: it is usually a small repair. The important part is figuring out which of the two causes you have, because one is a ten-minute fix and the other is a decision about your opener.
Cause 1: the safety sensors (photo eyes)
Every opener made since 1993 has two sensors mounted a few inches off the floor, one on each side of the door, sending an invisible beam across the opening. If anything breaks that beam while the door is closing, the door reverses – that is the law, and it is what keeps kids and pets safe. The problem is that the sensors live in the worst spot in the garage: the corner where snow, salt and slush pile up.
- Dirty or fogged lens – road salt film, cobwebs, condensation on a cold morning.
- Knocked out of alignment – a shovel, a bike, a garbage can. The brackets bend easily.
- Sun in the eye – low sun through an open door in the evening can blind one sensor.
- Damaged wire – rodents, a staple through the wire, corrosion at the terminals.
- A dead sensor – they do fail, especially after years of moisture.
How to tell: each sensor has a small LED. If one is off or flickering, the beam is broken. Wipe both lenses, gently straighten the brackets until both lights are solid, and try the door. If that fixes it, you are done. If the light will not come back, the sensor or its wiring needs replacing – a quick job for us.
Cause 2: the opener’s logic board
If both sensor lights are solid and the door still reverses, stops partway, runs on its own, or ignores the remote one day and works the next, the fault is inside the opener. On units 10-15 years and older, that is very often the logic board – the circuit board that controls the motor, the remotes and the safety system. Power surges, Minnesota humidity and simple age wear it out, and once it starts misbehaving it rarely gets better.
David’s honest advice on an old opener: a replacement board is possible, but it goes into a machine whose gear, motor and rail are the same age. On most 15-year-old openers a new LiftMaster opener – quieter, with battery backup and myQ – costs only a little more than the board and comes with a warranty. He will show you both numbers on site and let you choose.
Other reasons a door will not close
- Travel limits drifted – the opener thinks the door hit something when it just reached the floor. Adjusted in minutes.
- Force setting too sensitive – same fix.
- Something physically in the way – a bent track, a seized roller, or ice on the threshold (see frozen door).
- A broken spring or cable – the door is too heavy or crooked to close straight (springs, cables).
- Remote or keypad – dead battery or lost programming; the wall button still works.
Frequently asked
Why does my garage door start to close and then go back up?
Two things cause this on most of our calls. First, the safety sensors at the bottom of the tracks: if they are dirty, knocked out of line, or the wire is damaged, the opener thinks something is in the way and reverses. Second, on an older opener, the logic board – the circuit board that runs the motor. When it starts failing the door reverses, stops randomly, or ignores the remote. Sensors are a quick fix; a bad board on an old unit usually means it is time for a new opener.
How do I know if it is the sensors or the opener?
Look at the two small sensors near the floor on each side of the door. Each has an LED. If one is dark or blinking, the sensors are the problem – wipe the lenses, check that the brackets have not been bumped, and make sure the beam has a clear path. If both LEDs are solid and the door still reverses or behaves randomly, the fault is inside the opener, and on a unit more than 10-15 years old that is very often the logic board.
Can I bypass the safety sensors?
Holding the wall button down will usually force the door closed once – that is the built-in override for exactly this situation. Permanently bypassing the sensors is not something we will do; they are the only thing that stops the door on a child, a pet or a car bumper.
What does it cost to fix a garage door that will not close?
Sensor realignment, cleaning or replacement and most opener repairs run $75 to $200. If the logic board on an old opener has failed, David will give you the honest comparison on site: a new board versus a new LiftMaster opener with a warranty, which is often the better value.
Related: Why a garage door will not open (the other direction) · Opener repair and installation · Gear and sprocket repair (the motor hums but nothing moves) · Which LiftMaster opener is right for you · Price guide.
Who does the work? David Tuito, the owner – licensed and insured in Minnesota. About David’s Urgent Garage Door.
If the verdict is an old logic board, the replacement options are on the LiftMaster openers page – all three current models include a camera and myQ.
Two related symptoms have their own guides: a door that opens by itself and a remote or keypad that has stopped working while the wall button still does.
Door will not close tonight and you cannot leave it open? Call or text David at (763) 265-7671 – same-day sensor and opener repair across Minneapolis, St. Paul and the Twin Cities suburbs, 24/7. Stuck open at night counts as an emergency.