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Why Won’t My Garage Door Open?

There is a short list of reasons a garage door will not open, and most of them can be narrowed down in a couple of minutes without taking anything apart. Work down the list in order.

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Start with the opener, because about half of these calls are power, a remote, or a safety sensor rather than anything mechanical. If the opener is not the problem, the door or its balance is, and that changes what you do next entirely.

The five-minute check

  1. Is the wall control lighting up? If not, check the breaker before anything else.
  2. Is there anything in the way of the door — a car, a box, a bicycle, a broom, a leaf pile?
  3. Can you lift the door by hand? If it moves easily by hand, the door is fine and the opener is the problem.
  4. Do both safety sensors have a clear line between them, and are their lenses clean?
  5. Is the door itself straight in its opening, or is it visibly leaning or off its rollers?

The usual causes, in the order to check them

In rough order of how often they turn out to be the answer:

  • No power. A tripped breaker, a GFCI outlet in the garage that has tripped, or a dead wall console. If the wall control has no lights, this is where you start.
  • Safety sensors. The two photo-eyes beside the tracks. Blocked, dirty, or misaligned, and the door will not close — and on many openers, will not open either until the safety path is satisfied.
  • The remote or keypad. Dead battery, lost pairing after a power cut, or a remote from a different frequency. The wall console working is the tell.
  • A broken spring or cable. The door will not lift, and it may be sitting on the floor. The most serious of the causes and the one to call about.
  • Something in the track. A roller that has come out, debris, or a bent track section stopping the door partway.
  • A jammed or broken drive. A stripped chain, a slack or frayed belt, or a trolley that has stopped moving on a screw drive.
  • The opener unit itself. A failed capacitor makes the motor hum and stall. A failed board does nothing at all.
  • The door is too heavy. Out of balance, so the opener stalls before it has lifted the door.

Opening the door by hand safely

Opening by hand is a genuinely useful diagnostic: it separates “the opener is broken” from “the door is broken,” and those are completely different problems.

If the door is down, lift it from the bottom rail. If it lifts easily and stays where you put it, the door and its balance are fine and the opener is the problem — a sensor, a remote, a capacitor, a breaker, or a control board. If it lifts but slams straight back down, the springs are not holding it, and that is a call.

If it will not lift at all, the door is off its rollers, the track is damaged, or the cables have failed.

If you are locked in or out

If the car is inside and the door will not open, the first thing to try is the emergency release.

On most openers there is a red or green handle on the trolley — the carriage that runs along the rail above the door. A rope hangs from it. Pulling the handle disconnects the trolley from the rail, which lets the door be lifted by hand. That is what it is designed for, and it is the correct answer to this situation.

Some openers instead use a slide or a red lock bar that releases with a key or a tool, depending on the brand. If you cannot find a release, look for the opener brand on the motor housing and we can tell you which one it uses.

If the release is not reachable, the door is not intact, or the door has come off its tracks, call. Do not climb over or under a downed door, and do not try to force a panel — the edges are where hands get caught.

What you can fix, and what to call about

Reasonable to deal with yourself:

  • The breaker or a GFCI outlet that has tripped.
  • An obstruction in the path of the door or the sensors.
  • Dirty or misaligned safety sensors.
  • A dead remote battery, and re-pairing where the opener supports it.
  • Debris in the tracks, and rollers that need lubricating.

Call about these:

  • The door will not lift by hand at all.
  • Any suspicion of a spring or a cable. This is the short list of jobs with the potential to cause a serious injury.
  • A door that has come out of its rollers or is visibly bent.
  • An opener that hums, stalls, or does nothing.
  • A door that is unsecured and will not close — that is a security problem, not just a convenience one.

These usually go together, because the same underlying wear shows up in more than one place.

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Still not opening?

If the door will not lift by hand either, the failure is in the springs, the cables, or the rollers. That is a real mechanical fault, and the door may be unsecured — which is a good reason to call rather than keep trying.

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  • Urgent situations take priority
  • Straight answers on what is actually broken
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FAQ

Won't open questions

Why will my garage door not open with my remote?

Most often the remote rather than the door. Check whether the wall control works: if it does, the opener is powered and responding, and the problem is the remote — usually a flat battery, a lost pairing after a power cut, or a remote on a different frequency. If the wall control does nothing either, the problem is the opener, the power, or the door.

The opener is running but the door is not moving. What does that mean?

The opener is powered and the drive is turning, but the door is not following. The usual causes are a broken or badly slack chain or belt, a trolley that has stopped moving, a door that has come off its rollers, or a door so far out of balance that the opener stalls before it can lift it. A door that is off its rollers is often audible — you can hear the motor straining against nothing.

Can I force a garage door open?

Do not force a door that has dropped, is off its rollers, or is on a broken spring. Forcing it can bend the track, strip the opener, or bring the door down onto the opening. Opening a door by hand gently from the bottom rail is reasonable as a diagnostic if the door is intact and you are certain the springs and cables are sound — but if it will not lift easily, stop and call.

Why does my garage door not open after a power cut?

Two likely reasons. Some openers lose the remote and keypad pairing in a power interruption and need re-pairing. Some reset to factory settings and lose not just the remotes but any programmed smart-home or homelink integration, which then has to be set up again. The first thing to check is whether the wall console still responds.

My garage door will not open and I am locked out. What now?

Look for the emergency release on the trolley above the door — usually a rope attached to a red or green handle, or on some brands a key-operated slide. Pulling it disconnects the trolley so the door can be lifted by hand. If you cannot reach it, the door is damaged, or there is no release on the opener, call us. Do not climb over or under the door, and do not try to force a panel.

Is it an emergency if my garage door will not open?

It depends on the reason. A door that will not open because of a dead remote or a tripped breaker is not an emergency. A door that will not open because a spring or cable has failed is, because the door may be unsecured and is a drop hazard. A door that will not close is a security problem. If you are not sure which you are dealing with, call and describe the situation — that is a two-minute conversation.

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