Garage Door Won't Open? The Most Likely Causes and What to Do

Few things ruin a morning like a garage door that refuses to move — especially when your car is trapped inside and it's –20°C outside. The good news: a door that won't open almost always comes down to one of a handful of causes, and most of them leave clues you can spot in a couple of minutes.

One rule before anything else: don't keep pressing the button, and don't try to force the door up by hand. If a spring or cable has failed, the door's full weight is no longer supported, and forcing it can bend the tracks, strip the opener's gears, or drop the door.

Three quick checks that cost nothing

1. Step 1

   Check the power.

   Make sure the opener is plugged in and the breaker hasn't tripped. If the opener lights are dead, this is often the whole story.

2. Step 2

   Try the wall button and the remote.

   If the wall button works but the remote doesn't, you need batteries or reprogramming — not a repair. If neither works, the problem is in the door or the opener itself.

3. Step 3

   Look for a manual lock.

   Many doors have a slide lock or a lock bar on the inside. If it's engaged — sometimes bumped accidentally — the opener can't lift the door and will strain against it.

The most likely causes

1. Step 1

   A broken torsion spring.

   The most common urgent call we get. The classic sign is a loud bang from the garage, followed by a door that won't budge or feels impossibly heavy on the emergency release. Look above the door: a torsion spring with a visible gap in the coil is broken. The opener cannot lift the door's full weight on its own, and trying will burn it out.

2. Step 2

   A snapped or frayed cable.

   Cables work together with the springs to lift the door. When one lets go, the door often hangs crooked, jams partway, or won't move at all. You may see a loose cable on the floor or dangling beside the track. A door in this state is unsafe to run.

3. Step 3

   An opener failure.

   If the motor hums but nothing moves, the drive gear may be stripped or the chain or belt may have failed. If the motor is completely silent with power confirmed, the logic board or capacitor may be done. Many opener faults are repairable — a full replacement isn't always needed.

4. Step 4

   Sensor or wiring trouble.

   Photo-eye sensors mostly stop a door from closing, but a wiring fault or a shorted sensor circuit can also prevent the opener from running at all. Blinking opener lights are usually the opener telling you exactly where to look.

5. Step 5

   The door is off its track.

   If a roller has popped out or the track is bent, the door binds and refuses to move. Leave it alone — running the opener against a jammed door turns a straightforward realignment into bent panels and a bigger repair.

6. Step 6

   The emergency release was pulled.

   The red cord disconnects the door from the opener so you can lift it by hand during a power outage. If it was pulled accidentally, the opener runs and the door stays put. Re-engaging it is usually simple — but if the door feels heavy when you test it by hand, stop: that points back to a spring problem.

When to call a technician

Anything involving springs, cables, or a door off its track is professional territory — those parts are under serious tension and cause real injuries every year. Opener and sensor faults are safer to poke at, but a proper diagnosis still beats guessing at parts.

At Fenix Garage Doors, a technician inspects the door on site, identifies the actual cause, and gives you an exact written quote before any work begins. Our trucks carry springs, cables, rollers and opener parts, so most doors are opening again the same day — and emergency service runs 24/7 across Calgary and surrounding communities.