Garage Door Won’t Open or Close? Troubleshooting Guide

Few household moments are more annoying than a garage door that refuses to cooperate — especially with the car inside and work in twenty minutes. Before you call for repair, run through these checks in order. Most ‘dead’ doors are fixed in under five minutes, and you’ll know exactly when the problem is one for a professional.

Step 1: Check the obvious — power and lock

Start embarrassingly simple, because this fixes a surprising share of calls:

• Is the opener plugged in? Outlets on garage ceilings are often on a GFCI circuit — check whether the GFCI tripped, especially after rain.
• Is there a manual slide lock engaged on the door? If someone locked it from inside, the opener will strain and give up.
• Did someone hit the vacation/lock button on the wall panel? It disables remotes. Press it again to unlock.
• Check the circuit breaker. A tripped breaker plus a burning smell means stop and call an electrician, not a door tech.

Step 2: The remote and the keypad

• Replace the remote battery — weak batteries work from 3 feet away and fail from the driveway.
• Try the wall button. If the wall button works but remotes don’t, the problem is the remote or the opener’s receiver, not the door.
• Reprogram the remote (hold the Learn button on the opener, then press the remote). After power outages, some units forget their pairings.

Step 3: The safety sensors (the #1 culprit)

Those two little photo-eyes near the floor on each side of the door must see each other. If the door starts to close then reverses, or won’t close at all:

• Wipe both sensor lenses — cobwebs, dust, and winter road grime block the beam.
• Check the LED lights: both should glow steady. A blinking or dark sensor means misalignment or a pinched wire.
• Realign them so they point directly at each other, then tighten the brackets.
• Make sure nothing — a trash bin, a snow shovel, ice buildup — sits in the beam’s path. In Chicago winters, ice dams at the door base are a classic.

Pro tip: you can usually still open a door with blocked sensors; they only prevent closing. If the door won’t open either, keep going.

Step 4: Look at the door itself

• Broken spring? Look at the coil above the door — a visible gap means it snapped. The door will feel enormously heavy. Stop here and call a pro; do not keep running the opener.
• Off track? If a roller has popped out of the track or the track looks bent, don’t force the door. Forcing it turns a $150 track repair into a $1,000 panel replacement.
• Something in the way? Check the tracks for hardened grease, ice, or debris, and look for a bike handle or box wedged against the door.
• Frozen to the ground? In deep winter, the bottom seal can freeze to the concrete. Don’t yank it with the opener — chip the ice free gently or pour warm (not boiling) water along the seal.

Step 5: The opener’s limits and force settings

If the door opens partway and stops, or closes then immediately reopens, the travel limits or force settings may be off — common after a DIY adjustment or a power surge. The adjustment screws are on the opener unit (consult your manual). Turn them in small increments. If you’re not comfortable on a ladder around the unit, skip this step.

When to stop troubleshooting and call a pro

Call a professional if: the spring is broken, cables look frayed or loose, the door is off its track, the opener strains loudly, or anything involves the high-tension parts. Note what you observed — ‘sensors aligned, door heavy, gap in spring’ gets you an accurate quote and often same-day service. And never disconnect the opener and leave a broken-spring door propped open: it can slam shut without warning.

Frequently asked questions

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