Garage door won't close: common causes and fixes

A garage door that will not close is more than an inconvenience — it is a security and safety problem. In Ottawa, causes range from misaligned photo-eyes and worn opener gears to broken springs or an off-track panel. This guide walks through safe checks you can do at home and when to schedule professional emergency repair.

Quick checks before you call

Photo-eye sensors

Sensors near the floor must “see” each other. If a bin, shovel, or snow mound blocks the beam, the opener will reverse as a safety feature. Wipe lenses gently and align both brackets so the indicator lights are steady (not blinking on most models).

Wall button vs remote

If the door closes when you hold the wall button but not with the remote, the problem may be remote battery or signal — not the door itself. If it will not close on the wall button either, suspect mechanics or opener limits.

Obstruction on the track

A bent track pin, debris in the rail, or a damaged roller can bind the door. Look for gaps between rollers and track; do not force the door.

Mechanical causes that need a technician

• Broken spring — door may feel heavy or crooked; opener cannot lift properly (read more)
• Frayed or off-drum cable — door may hang unevenly; high tension — do not DIY
• Off-track door — often after impact; stop using the opener
• Worn opener gear or carriage — humming motor, little movement
• Incorrect force / limit settings — door hits floor and reverses; needs adjustment after spring changes

Why the door reverses halfway down

The opener thinks it hit an obstacle. Causes include misaligned sensors, force set too sensitive, a sticking panel, or a binding roller. After any spring replacement, limits and force must be recalibrated — one reason professional balancing matters.

Our opener service covers gears, limits, remotes, and safety testing end-to-end.

Ottawa weather and closing problems

Extreme cold can stiffen rollers and thicken grease on the rail. Ice at the threshold can block the seal. Rubber bottom seals that freeze to the floor may need gentle clearing — never yank a stuck door with the opener. See winter prep tips for prevention.

When this is an emergency

Call or text (613) 900-6005 if the door is stuck open overnight, hanging on one side, or you suspect a broken spring or cable. We are available every day, 9 a.m.–9 p.m., with priority scheduling when routes allow.