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Home Repair

Garage Door Won't Open? Fixes for Every Failure Mode

Garage doors fail loudly (a bang and now it won't lift β€” that's the spring) or confusingly (opens but won't close, reverses at random, ignores the remote). The confusing ones are almost all DIY: misaligned sensors, travel limits, or a lock mode you didn't know existed. The loud one is not DIY β€” and knowing the difference protects both your wallet and your fingers.

Time10–40 min
DifficultyEasy–Moderate
Typical savings$100–$250
πŸ“Έ

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What you'll need

⚠️ Safety firstNEVER touch the torsion spring (the big coil above the door) or its cables. A wound spring stores enough energy to break bones. Spring and cable work is professional-only, full stop.

Step-by-step fix

1

Door won't close, opener light blinks: align the safety sensors

The two little eyes 6 inches off the floor on each track. Kicked mowers and brooms knock them askew constantly. Clean the lenses, aim them at each other until both LEDs glow steady (one amber, one green typically). This is the #1 garage door service call.

2

Remote dead but wall button works: battery, then re-pair

Swap the remote battery. Still dead: press LEARN on the opener head unit, then a button on the remote within 30 seconds. Wall button also dead? Check the outlet the opener's plugged into (see our dead outlet guide β€” GFCIs strike again).

3

Everything dead after a power blip: check lock mode

Many wall consoles have a LOCK button that disables remotes β€” kids and elbows find it. Hold it 2–5 seconds to unlock. Also re-check the opener's outlet and breaker.

4

Door reverses before touching the floor: set travel limits & force

Two dials/buttons on the opener head (down-travel and force). The door thinks it hit something. Small adjustments, test between each. Also inspect the track for actual obstructions and the rollers for binding.

5

Door reverses ON touching the floor: floor or limit

Weather seal compressing on an uneven floor reads as an obstruction. Slightly reduce down-travel.

6

Opener runs but door doesn't move: the trolley is disconnected

Someone pulled the red release cord. Pull it again toward the door (or per your model), then run the opener β€” the trolley re-engages with a clunk. If the door is also very heavy to lift manually, STOP: that heaviness is a broken spring, and the opener was never the problem. Scan the spring area with SpotFix AI to confirm the break visually β€” then book the pro.

When to call a pro instead

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Common questions

How do I open the door manually during a power outage?
Pull the red emergency release cord, then lift. If the door is balanced (springs healthy), it lifts with one hand and stays half-open on its own. If it's brutally heavy β€” broken spring; don't force it.
Why does my door shake and roar?
Dry rollers, hinges, and chain. Silicone-spray the rollers and hinges (never the tracks), tighten hinge bolts, and it'll run years quieter. Nylon roller upgrades are cheap and transformative.
How long do garage door springs last?
About 10,000 cycles β€” roughly 7–10 years of normal use. When one breaks, replace both (the other has identical mileage). It's a $200–$350 pro job; spring injuries are why.

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