Why won't my garage door open?

The most common causes are a broken spring (often preceded by a loud bang and a very heavy door), a snapped cable or off-track door (crooked lift), a dead opener (no power or a failed board), or a blocked safety sensor (door starts then reverses). Use the diagnostic to narrow it down.

Why does my garage door reverse before it closes?

Almost always the safety photo-eye sensors near the floor are blocked, dirty or misaligned. Clear any obstruction, wipe the lenses and check both sensors show steady lights. This is the one common cause that is often a simple DIY fix; if it persists, a sensor repair is a modest service call.

Is it safe to force a stuck garage door open?

No. If the cause is a broken spring, snapped cable or off-track door, forcing it can cause serious injury or drop the door. Those repairs are for a trained technician with the correct tools. Only a blocked sensor is safe for a homeowner to address.

Should I repair or replace a dead opener?

If the opener is old and the logic board or motor has failed, replacement is often cheaper than repair and gains you modern safety and smart features. Compare a repair against the opener replacement tool; first rule out simple power issues like a tripped breaker.

Garage door won't open or close: likely causes and repair costs

A stuck garage door usually has one of a handful of causes. This guide helps you read the symptom, understand the likely fault, and budget the repair.

By Francesco Zinghinì

When a garage door refuses to open or close, the cause is usually one of five things. Reading the symptom narrows it down fast, and each cause has a fairly predictable repair cost. The won’t-open diagnostic maps your symptom to the likely cause and the matching cost tool; this guide explains the reasoning.

⚠ Safety first: if the cause is a spring, cable or off-track door, do not try to fix it or force the door. Springs and cables store extreme mechanical energy and can cause serious injury or death — that work is for a trained technician with winding bars. Below is about diagnosis and cost, not a repair procedure.

Symptom: a loud bang, now the door won’t open

A sharp bang from the garage followed by a dead, very heavy door is the classic broken torsion spring. The opener cannot lift the unbalanced weight and may strain or reverse. Do not force it. This is one of the most common failures and one of the more affordable repairs — estimate it with the spring replacement tool, and remember springs are replaced in pairs.

Symptom: the door is crooked or one side hangs low

A door that lifts unevenly, hangs at an angle or has a visibly loose cable often has a snapped or frayed cable, or has come off its track. Both are dangerous to operate — forcing the door can worsen the derailment or drop it. Budget a cable/roller/hinge repair with the cable, roller & hinge tool or an off-track repair with the off-track tool.

Symptom: the door won’t move and the opener is silent

If nothing happens — no motor hum, no lights — suspect a dead opener, a tripped breaker, an unplugged unit or a failed logic board. Check power first. If the opener is genuinely dead and old, replacement is often more economical than repair — compare with the opener replacement tool. If the opener hums but the door does not move, the fault may be mechanical (spring/cable) rather than electrical.

Symptom: the door starts to close then reverses

A door that reverses just before closing is almost always the safety sensors (photo-eyes) near the floor being blocked, misaligned or dirty. This is the one benign, often DIY-friendly cause: clear obstructions, wipe the lenses and check that both sensors are aligned (steady indicator lights). If alignment does not fix it, a sensor or wiring repair is a modest service call — see the general repair tool.

Symptom: the door binds, grinds or is noisy

Grinding, squealing or a door that sticks partway can be worn rollers, dry hinges or a bent track. Caught early, this is a maintenance/tune-up item; left alone, it can lead to an off-track door. Price a tune-up with the tune-up tool or a parts repair with the cable, roller & hinge tool.

How the costs compare

Sensor cleaning/alignment: often free to a modest service call — the cheapest fix.
Spring replacement: a common, mid-range repair; done in pairs.
Cable/roller/hinge: parts plus a service call.
Off-track repair: labor-heavy; more if the track is bent.
Opener replacement: the unit plus install; consider it if the opener is old.

Symptom: the remote works but the wall button doesn’t (or vice versa)

Control quirks are their own category and usually point away from the door hardware. If the remote works but the wall button does not, suspect the wall-button wiring or the button itself. If the wall button works but remotes do not, it is often dead remote batteries, a lost programming, or a jammed frequency — reprogram the remote and swap the battery first. If nothing operates it but the opener has power and lights, the logic board may be failing. If the door opens but will not close from the remote yet closes when you hold the wall button, that is a deliberate safety behavior signaling a blocked or misaligned photo-eye. These are inexpensive fixes compared with mechanical repairs, and many are genuinely DIY: new batteries, reprogramming, cleaning and aligning sensors, or tightening a wall-button wire. Rule them out before assuming an expensive fault — a “dead” door is often just a $5 battery or a smudged sensor lens.

When in doubt, diagnose then price

Start with the diagnostic to identify the likely cause from your symptom, then open the matching cost tool for a planning estimate. The only fault most homeowners should touch is a blocked or misaligned sensor; everything involving springs, cables or an off-track door is a job for a trained, insured technician. Every figure here is a planning estimate, not a bid.