Stuck Garage Door: What to Check Before You Force Anything

Stuck Closed: Look at the Spring First

If the door was working and then refused to open, think back: did you hear a loud bang from the garage recently? That sound is the classic sign of a torsion spring breaking. Look at the spring mounted on the shaft above the closed door. A broken torsion spring shows a clear gap of about two inches in the coil where the steel snapped. If your door uses extension springs instead, they run alongside the horizontal tracks, and a broken one may hang loose or look stretched apart.

Next, press the opener button once and watch. If the motor hums and the door lifts a few inches then settles back, or the trolley moves but the door does not, the problem is in the door itself, usually a spring or cable. If nothing happens at all, the opener or its power supply is the more likely suspect. Remember that the springs, not the opener, do the real lifting. A double-wide steel door can weigh well over 150 pounds, and the opener motor is only designed to move a door the springs have already balanced.

Also glance at the cables that run from the bottom corners of the door up to the drums above. A frayed cable, or one side hanging slack, means the door can jam or sit crooked. Do not force the door in any of these cases.

Stuck Open: A Different Problem With a Security Cost

A door stuck open has its own set of causes. The photo-eye sensors mounted about six inches above the floor on each side of the opening only interrupt closing, never opening, so a blocked, dirty, or misaligned sensor leaves a door stuck up, not down. Many openers blink their overhead light to signal a sensor fault. Other causes include a roller that has jumped the track, an object wedged in the track, or a spring that failed while the door was up.

Treat a stuck-open door with some urgency, because an open garage exposes your belongings and often an unlocked entry door into the house. The safe checks are limited: clear anything blocking the sensor beam, wipe both lenses with a soft dry cloth, and confirm the small indicator light on each sensor glows steady. Do not yank down on the door itself, and do not pull the release cord while the door is up, for the reason explained next.

The Red Release Cord: When to Pull It, and When Not To

The red cord hanging from the opener rail connects to the trolley carriage, the part that drags the door along the rail. Pulling the cord disconnects the door from the opener so you can move the door by hand.

Safe: pulling the cord when the door is fully closed. Once released, a healthy, balanced door lifts smoothly and will stay put if you stop it around waist height. If the door feels extremely heavy, a spring has likely failed. Set it back down gently and stop.

Not safe: pulling the cord while the door is open. If a spring or cable has failed, the opener trolley may be the only thing holding the door up. Releasing it can let the full weight of the door slam to the floor with nothing to slow it. Keep people, pets, and vehicles out of the opening until the door is secured.

Frozen to the Slab in Winter

In freezing weather, meltwater can refreeze under the door and bond the rubber bottom weather seal to the concrete slab. The opener strains for a moment, then stops or reverses when it hits its force limit. Do not keep pressing the button; repeated straining can strip the trolley or the opener's drive gear.

This one is safe to fix yourself. Break the ice bond by pushing gently along the bottom edge of the door from inside, or pour warm (never boiling) water along the seal and try the opener once. Afterward, dry the seal and the slab edge so it does not refreeze. If the door still will not move once the ice is gone, go back to the spring and cable checks above.

When to Stop and Request Service

Stop troubleshooting and submit a service request through the form on our contact page if you see any of these:

• A visible gap in the torsion spring coil, or a hanging extension spring
• A frayed, snapped, or slack lifting cable
• Rollers out of the track, or a door sitting crooked in the opening
• A door that feels far too heavy to lift after pulling the release
• An opener that strains, hums, or reverses every time you try it

Springs and cables store enough energy to cause serious injuries, which is why adjustment and replacement of tensioned parts should be left to a technician. When you fill out the request, describe the symptoms: stuck open or stuck closed, any bang you heard, and what the opener does when you press the button. Repair needs vary by door and hardware, and those details help a technician assess the problem and arrive prepared.