Garage door hangs crooked with one side higher

Tilted door problem

What a crooked door looks like

A crooked door can show up in several ways. While opening, one side may travel ahead of the other so the bottom edge tilts like a drawbridge. When closed, one corner may sit above the floor while the other touches it. Sometimes the door looks level at rest but twists as it moves, with a visible skew in the top panel or a gap against the jamb on one side.

You may also hear it. Uneven doors often groan, scrape or pop because rollers on the high side lose contact while the low side binds. The opener may strain, and the door may stop partway or reverse because the sensors and force settings read the extra effort as an obstruction.

The reason this matters is that a garage door is designed to lift evenly on both sides. When the two sides disagree, the tracks, rollers, panels and the opener all carry loads they were never meant to carry, and the problem tends to get worse with each cycle.

It helps to know that crookedness can be gradual. Many owners notice only after a change in season, a loud noise or a day when the door stops partway. In a humid climate like Houston, metal parts rust slowly, grease dries out and wood framing moves a little with the weather, so a door that was almost level can drift out of true over months. Looking at the door on a calm day, with the garage lights on, makes small differences easier to see.

Uneven cables are the most common cause

Lift cables run from the bottom corners of the door up to the drums at the ends of the spring shaft. Each one carries half of the door's weight. If one cable stretches, slips on its drum, frays or comes off, that side loses support and drops while the other holds. The result is a door that tilts toward the weaker side.

Cables rarely fail without warning. Fraying, kinks, rust and a cable that sags when the door is down are all hints that something is changing. Our pages on a frayed garage door cable and a cable slipped off the drum describe those signs.

Do not touch the cables. They are under high tension, and the bottom brackets that hold them can snap or throw a tool. The guide on how cables and drums work explains what is happening behind the scenes without asking you to handle anything.

One detail worth knowing is that a cable can slip off its drum without breaking. If the door was jolted, or if it hit an obstruction while closing, the cable can go slack for a moment and then wind onto the drum incorrectly. The door then looks fine at first glance, but one side hangs lower and the cable no longer sits in its groove. That is a repair for a technician, because the drum, the cable and the tension must be put right together.

A worn spring end or uneven spring tension

Springs do the real lifting, and the two sides of a door should receive equal support. On many doors, a single torsion spring or a pair sits on a shaft above the opening and turns drums on both ends. If a spring is weakening, mounted unevenly or has partly broken, one side may get less lift than the other.

With two torsion springs, one can break while the other keeps going, and the door may still seem to work. It will feel heavy, and it may lean. The remaining spring is also doing double duty and will not last long. See broken garage door spring for the signs.

Adjusting spring tension is dangerous and must be left to a trained technician. If you hear a loud bang in the garage, see a gap in a coil or notice the door suddenly feels heavier, stop using the door. The page about how garage door springs work explains the idea without asking you to touch them.

Another point is how springs wear. Every trip up and down winds and unwinds the spring, and over thousands of cycles the metal tires. A spring does not usually weaken evenly on both sides of a pair, so one end can lose strength first. That is why a door can start leaning well before anything actually breaks, and why it is wise to treat a new tilt as a warning instead of a quirk.

A stuck or broken roller

Rollers guide the door up and down the tracks. If one roller is seized, cracked, missing or has popped out of the track, that side can drag while the other moves. The door may look crooked at rest and may jerk as it travels. A roller stem can also bend after an impact or years of wear.

Nylon rollers can crack and steel rollers can rust or wear their bearings. Dirt and dried grease inside the track add friction. The page on worn garage door rollers shows how to tell a tired roller from a healthy one by looking and listening.

A stuck roller is often the result of another problem, not the cause. A bent track, a loose hinge or misaligned bracket can all pinch a roller. That is why a technician looks at the whole path of the door instead of replacing just the roller that sounds worst.

If you have ever seen a shopping cart with one bad wheel, you already understand the idea. The cart pulls toward the stuck wheel, and every other wheel and the handle have to compensate. A garage door with one sticky roller does the same thing on a larger scale, and the sideways force lands on hinges, panels and the opener arm. Replacing rollers is usually part of a broader tune up of the moving parts.

Bent tracks, loose brackets and sagging sections

Tracks are bolted to the jamb and ceiling, and they can shift if the screws loosen or if the door has been struck. When one track sits farther from the door than the other, or tilts forward, the door follows it. A track that is out of plumb will make a door tilt even if the cables and springs are perfect. Read how tracks and rollers work to understand why alignment matters.

Hinges and brackets hold the sections together. A loose hinge can let a panel shift, and a bent bottom bracket can lift one corner. Over time a door that has been sagging in the middle may also lean. Our page on a garage door that sags in the middle covers a related set of symptoms.

If you see a gap between the door and the weatherseal on one side, or a visible bend in the track, take a photo. Do not push or bend anything back. A track that has moved is part of a system that is under load, and forcing it can cause the door to fall.

Why a crooked door strains the opener and everything else

Openers are made to move a balanced door, not to straighten a crooked one. When one side lags, the trolley and rail take twisting forces. The motor works harder, the force sensing may trigger a reversal, and gears can wear. A door that tilts may also strain the top bracket, where the opener connects to the panel.

The tracks and rollers take extra wear as well. A roller on the low side gets pressed against the track, while the high side swings loose. Panels can flex, hinges can crack and weather seals can tear because the door is not meeting its frame evenly.

This is why the cost of waiting grows. A fixable cable or roller problem can turn into a bent track, a cracked panel and a stressed opener when the door keeps being used. Putting the door out of service sooner often keeps the repair smaller.

There is a safety side too. A door that tilts can catch on the jamb, bind in the track or fall on one end if a cable lets go. Children, pets and cars tend to be near the garage door without thinking about it. Treating a crooked door as unsafe to operate, and keeping the area clear, is a reasonable precaution until a trained person has seen it. General safety habits apply: stay clear of the door while it moves and never put fingers near hinges or tracks.

What you can safely observe

Start with the door closed. From the side and not under it, note which corner is higher or lower, whether the bottom edge touches the floor on either side and whether there is a gap at the jamb. Look at the cables from a distance for sag, fraying or a loop that should not be there. Look at the tracks for visible bends or gaps.

Listen as well, but only if the door is operating without stress. If you hear grinding, popping or scraping, or if the door shudders, stop using it. Do not release it, climb a ladder or reach into the track to feel for problems.

Keep people and vehicles clear of the door. If the door is open and stuck at an angle, do not walk under it or try to lower it by hand. A tilted door can drop without warning.

• Note which side is higher when the door is closed and when it is partly open.
• Look for a cable that sags, frays or has come off a drum.
• Check for a gap against the jamb on one side.
• Keep hands, tools and ladders away from springs, cables and brackets.

Balance and the hand test, with care

Technicians test balance by disconnecting the opener and lifting the door by hand, watching whether it stays up or falls. You should not try this on a crooked door. If the springs or cables are uneven, the door can slam down or twist when released. The guide on how to test garage door balance explains why it is only for doors that are in good condition.

If the door is badly out of balance, the symptoms include a door that rises with a jerk, falls on its own or feels heavy on one side. These are signs that the springs and cables are out of harmony. It is related to a garage door out of balance, but a crooked door adds the left to right difference.

When you speak to the technician, describe the tilt in simple terms. Which side is high, does it change as the door moves, and when did it start. Those details help distinguish a cable on one side from a general spring problem.

If you can safely do so, record a short video from the side of the garage while the door is operated once, if it still moves without trouble. Skip this if the door shakes, scrapes or stops. A video shows which side leads, where the door twists and what sounds it makes, which are things that are hard to put into words. Never stand beneath the door or place your hands near the track while recording.

What a technician will check on site

On site, a trained technician begins by looking at the door at rest and in motion, using safe practices. They check both cables, both drums and both ends of the spring system. They look at the rollers, hinges and tracks on each side and compare them. They also check the opener's connection and force settings.

If a cable is the cause, the technician will explain what happened and what the repair involves. Our broken cable repair page describes how that work is approached. If a spring is the cause, spring repair explains the replacement and balancing steps.

Before any work begins, the options are discussed with you. After the work, the door's operation is reviewed with you so you can see it level and moving evenly.

Repairs that return the door to level

A crooked door often needs more than one correction. Replacing a cable without checking the spring can leave an unbalanced door. Fixing a roller without straightening the track can leave the same tilt. A thorough approach looks at the lifting system as a single unit, so the springs, cables, drums and tracks are all made to agree.

Sometimes the door itself has been bent. If a panel is twisted, the bottom corners may never sit level until the section is replaced. The technician may suggest replacing a panel, adjusting hardware or in some cases replacing the door. Ask what each option does and what remains unchanged.

If the door has several worn parts at once, the technician may suggest replacing them together. Replacing a single cable on a door whose springs, rollers and hinges are all tired can mean another visit soon after. Weighing that against the extra work now is a normal conversation to have, and the answer depends on the age and condition of your particular door.

Because every door is different, there is no single recipe. What matters is that the repair is explained before it is done and that the door is checked in operation afterward.

When to stop and call

Stop using the door and call if one side is visibly higher, if you see a loose cable, a gap in a spring coil, a bent track or a roller out of its channel. Also call if the door shakes, makes loud noises, reverses unexpectedly or will not close.

Keep people and pets away, and do not park under an open crooked door. Do not try to straighten it by pulling on one side or pushing it into place.

In Houston, a door that will not close properly also leaves the garage open to wind, rain and critters, so it is worth acting on. When you call, describe the tilt and any sounds. You can read more on the page about garage door repair in Houston.

Questions and answers