Garage door will not close? Start with the safety sensors, then call for same-day help

Why won't my garage door close?

Almost every won't-close call comes down to the photo-eye safety sensors. Two small eyes sit about six inches off the floor on each side of the door. When their beam is broken, the opener refuses to close so it cannot trap anyone.

This is the UL 325 auto-reverse safety standard working as designed. A leaf, a box, a parked bicycle, a cobweb, or a sensor nudged out of line all break the beam. Less often the cause is a door off the track, a worn roller binding, or the opener close-force set wrong. Start at the sensors, because that is the fix four out of five times.

First check: are the photo-eye sensors blocked or misaligned?

Look at the two sensors near the floor. Each has a small LED. A steady, solid light on both means they are aligned. If one is off, dim, or flickering, the beam is broken and the door will not close.

Walk the door's path and remove anything in the way, even a recycling bin or a coiled hose. Wipe both lenses with a dry cloth, because road salt, frost, and spider webs scatter the beam. If both LEDs now glow steady and the door closes, you are done. If not, the sensors likely need re-aiming or have a damaged wire, which is what our garage door safety sensor repair and alignment covers.

The opener light blinks when I try to close

A blinking opener light is the sensors reporting a fault. On a LiftMaster or Chamberlain the up light flashes, often ten times, the instant you press close. Genie openers show a similar blink. It always points to the photo-eye circuit.

The blink means blocked, misaligned, or disconnected sensors. Re-aim them until both lenses face each other and the LEDs hold steady. If the light keeps blinking after a clean realignment, suspect a pinched or corroded sensor wire or a tripped opener logic board, which calls for a garage door opener repair.

The door closes part-way, then reverses back up

A door that travels most of the way down and then rolls back up is reading an obstruction or has its close-force and travel limits set wrong. The opener thinks the door hit something solid, so it reverses to protect you.

First rule out a real obstruction, a worn roller dragging, or a flattened weather seal grabbing the floor in the cold. If the path is clear, the close-force is too sensitive or the down travel limit stops short, so the opener slams into the floor and bounces. Both are quick adjustments on the opener head, no parts needed.

One sensor shows a red light and one shows green

That is the classic misalignment signal. One sensor sends and one receives. The receiver LED, usually green, only lights steady when it sees the sender, usually amber or red. A green that flickers or goes dark means the two eyes are not pointed at each other.

A bump from a snow shovel, a swollen mounting bracket, or a slipped wing nut throws the angle off by the millimetre it takes to break the beam. Gently bend each bracket until the steady light returns on both. If the sender light itself is dead, the sensor has lost power and needs a wiring check.

The door will not close after I moved things in the garage

This is the most common reason of all. While shifting boxes, bikes, or bins, something brushed a sensor and knocked it out of line, or a stored item now sits in the beam. The fix is usually two minutes of clearing and re-aiming.

Sweep the floor at sensor height on both sides, then check the LEDs. If you leaned a ladder or a sheet of plywood against the wall, it may be clipping the beam even though it looks clear. Move everything back from the tracks by a foot and the door will usually close on the next try.

How do I realign my garage door sensors?

Realigning the photo-eye sensors takes about five minutes and no special tools. Clear the path, loosen the bracket, point each sensor straight at the other, and tighten when both LEDs hold steady. Follow these five steps in order.

1. Clear everything from the door's path and wipe both sensor lenses with a dry cloth.
2. Find the two LEDs, one on the sender and one on the receiver, near the floor on each track.
3. Loosen the wing nut or screw on the sensor whose light is off or flickering.
4. Tilt that sensor slowly until its LED glows solid and steady, then hold it still.
5. Tighten the bracket without nudging the angle, and test the door from the wall button.

If both lights are steady and the door still will not close, the wiring or opener board is at fault, not the alignment. That is a call for us. If your door is also off the track, do not run the opener, because it can pull the door further off track and bend the panels.

Why does my garage door reverse before it touches the floor?

A door that reverses an inch or two above the floor has its down travel limit or close-force set wrong, or it is dragging on a worn roller. The opener senses resistance early and reverses, reading it as something underneath.

In Ottawa cold this often shows up when a stiff weather seal or a frozen spot on the slab adds drag. We adjust the limit and force so the door seats fully without slamming, and replace any binding rollers. A worn roller set runs $100 to $200, and a fresh set lets the door glide shut quietly again.

Is it safe to leave my garage door open overnight?

No. An open garage is an open invitation. It exposes your car, tools, and the inside door to your home, and it lets heat pour out all winter. If you cannot get the door down, pull the manual release and close it by hand, then lock it.

To use the manual release, pull the red cord hanging from the opener rail to disconnect the carriage, lower the door by hand, and slide the manual lock or set a board to hold it. Then call us. If you need it secured tonight, we offer 24/7 emergency garage door repair to secure your home tonight across the city.

Common reasons an Ottawa garage door will not close

Beyond the sensors, a handful of mechanical faults stop a door from closing. Here are the causes we see most across Orleans, Vanier, Nepean, and Gatineau, roughly in the order we check them on a service call.

• Misaligned or dirty photo-eye safety sensors. The number-one cause. A bumped bracket, salt film, or web on the lens breaks the beam and the opener refuses to close.
• Damaged sensor wiring or a tripped opener. A pinched, corroded, or stapled-through wire kills the beam even when the sensors look aligned, and a glitched logic board can lock out the close cycle.
• Door off the track or a bent track section. If a roller has jumped the rail or a track is crimped, the door binds before it seats and the opener reverses.
• Worn rollers binding in the track. Flat-spotted or seized rollers drag the door, which the opener reads as an obstruction and reverses to avoid.
• Close-force or travel limits set wrong on the opener. Too little force or a short down limit makes the door stop or bounce before it reaches the floor.

If the door has fully left the rail, do not keep pressing the button. That is an off-track garage door repair, and forcing it bends panels. A door stuck open and will not move at all usually has a deeper mechanical fault we should see in person.

What does it cost to fix a door that will not close?

Most won't-close visits are a sensor realignment, covered by the $35 to $85 service call, which is free when it leads to a repair over $250. Worn rollers run $100 to $200, and opener or sensor repairs start from $150. There is no overtime fee.

We quote the price before we start, never after, and we carry common sensors, rollers, and opener parts on the truck so most jobs finish in one same-day visit. You will know the cost before any work begins, with no surprise charges for an evening or weekend call.

How fast can you secure my open garage today?

Same day, seven days a week. Call (613) 255-1968 and we aim for a within-the-hour callback to confirm a window. We run no-overtime same-day service so a door that will not close gets secured before nightfall, not next week.

Every repair is backed by our 90-day Done-Right Promise, and the work is led by factory-trained owner Omar. If you would rather not call, you can book same-day service to close your door online and we will reach out to lock in a time.

Same-day garage door repair across Ottawa and Gatineau

We fix won't-close doors right across the region, from Orleans and Vanier to Nepean, Kanata, Barrhaven, and into Gatineau. Wherever you are, we come to you the same day, fully insured, with the sensor and roller parts to finish on the spot.

See our full same-day garage door service across Ottawa and Gatineau coverage, including dedicated garage door service in Orleans. No matter the brand, LiftMaster, Chamberlain, Genie, or Garaga, we have your door closing safely again today.