Garage door symptoms: what’s wrong and what to do

By Richard Gordon · Reliant Garage Door Repair

Most garage door problems trace back to one of a handful of parts. This page lists the symptoms we are called about most, the most likely cause of each, and what to do right now — including which problems are safe to wait on and which are not.

Use the quick table to jump to the likely cause, then read the matching section below for what it means and the safe next step. One rule throughout: never try to adjust or release the springs, cables, or bottom brackets yourself — they hold enough tension to injure you, and they are exactly what we are for.

Your garage door won’t open at all

The most likely cause is a broken torsion spring. If the opener runs and strains but the door barely lifts — or will not move — the spring that counter-balances the door has almost certainly failed, leaving the full weight for a motor never built to lift it. Do not keep pressing the button; you can burn out the opener or pull the door off its track. This is a same-day spring replacement, and if your car is trapped inside it is an emergency.

Your garage door won’t close (or closes then reopens)

Nine times out of ten this is the photo-eye safety sensors near the floor. If the door starts down then reverses, or will not close and the opener light blinks, check the two small sensors on each side of the opening: wipe the lenses, make sure both indicator lights are on and steady, and clear anything leaning in the beam. If that does not fix it, the sensors are misaligned or failed — a quick sensor repair.

You heard a loud bang from the garage

A sudden gunshot-like bang is almost always a torsion spring snapping. You may not notice until you next try to open the door and find it will not budge. Leave it closed, keep the car where it is if the door is down, and call us — we replace springs in pairs so you are not back here in a month. See our illustrative spring-failure case study for how that visit goes.

The door is crooked, or one side hangs lower

A lift cable has slipped off its drum or broken. When one cable lets go, that corner drops and the door racks at an angle — and it is now unsafe to operate, because forcing it can send it fully off the tracks. Stop using the opener and book a cable repair. A crooked door is one to deal with the same day.

The door jumped off its tracks

Off-track doors come from an impact, a broken cable, or worn rollers — and they are a safety hazard. A door hanging out of its track can fall. Do not try to force it back on by hand; the panels and rollers bend easily and the spring may still be loaded. This is a priority off-track repair.

The opener motor runs but the door doesn’t move

Usually the trolley has been disconnected, or the opener’s drive gear has stripped. First check the emergency-release cord: if it was pulled, the carriage is disengaged and re-engaging it (with the door closed) reconnects the opener. If it is already engaged and the motor just whirs, the plastic drive gear has likely worn out — a common, fixable opener repair. A door that is also heavy by hand points back to a broken spring instead.

The door is noisy — grinding, squealing, or shuddering

Noise almost always means dry or worn rollers and hinges, or loose hardware. A door that still works but has gotten loud is telling you it is overdue for service: lubrication and a hardware check quiet most doors, and worn steel rollers get swapped for nylon. Grinding that lube does not cure can mean failing rollers or an opener on its way out. Book a 21-point tune-up before a noisy door becomes a stuck one, and see our maintenance guide for what you can do yourself.

The remote or keypad stopped working

Start with the battery, then reprogramming. If one remote is dead, it is usually its battery; if every remote and the keypad fail at once, suspect the opener’s antenna or logic board, or that the opener has lost power. A keypad that will not accept the code often just needs reprogramming. We reprogram, sync, and replace remotes and keypads and set up smart openers — remote and keypad repair.

When a garage door symptom is an emergency

Call the same day — do not wait — for any of these: a door stuck down with a car trapped inside, a door stuck open (your home is unsecured), a door hanging off its tracks, a visibly broken or dangling cable or spring, or a door that fails the auto-reverse safety test. A door that still works but is noisy or slow is not an emergency, but it is the cheapest time to fix it. When in doubt, call (630) 937-3540 and describe what it is doing — we will tell you honestly whether it can wait.