When a garage door won’t open, the cause is usually simple and safe to check: the opener lost power, the wall-mounted lock or vacation switch is engaged, the remote battery is dead, or the photo-eye safety sensors have been bumped out of alignment. Work through the checks below in order — most Houston homeowners find the problem in a few minutes. One thing to be clear about up front: if the door feels impossibly heavy, hangs crooked, or you hear a loud bang from a broken spring, stop. The torsion spring and cables are under extreme tension and are never a DIY fix. For everything else, start here.
What you'll need
- A step stool
- A flashlight
- Fresh remote batteries
- A soft cloth
Recommended parts & supplies
- Universal garage door remote — if your remote is lost or dead beyond a battery swap
- Photo-eye safety sensor set — if a sensor is cracked or failed, not just misaligned
- Garage door lubricant — a dry, binding door can strain the opener
- Remote battery multi-pack — check your remote for the size printed inside
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Step by step
- 1
Confirm the opener has power
Start at the outlet. Make sure the opener is plugged in and that the outlet has power — try a lamp or phone charger in it. Houston’s summer storms and grid strain trip breakers and GFCI outlets often, so check your electrical panel for a tripped breaker and press the reset button on any GFCI outlet the opener shares. If a recent power flicker reset the opener, restoring power is the whole fix.
- 2
Check the wall lock and vacation switch
Look at the wall-mounted control button inside the garage. Many have a small “lock” or “vacation” button (or a physical slide lock on the door track) that disables the remotes to stop the door from opening. If someone bumped it or set it before a trip, the opener will click but won’t move from the remote. Toggle it off and try again.
- 3
Replace the remote battery and try the wall button
Press the wall button inside the garage. If the door opens from the wall but not the remote, your remote battery is dead — pop it open and swap in a fresh coin or 12V battery. If nothing works from either control, the problem is at the opener or its power, not the remote.
- 4
Look at the photo-eye safety sensors
Near the bottom of each track, about six inches off the floor, sit two small sensors that face each other. If their little indicator lights are off, blinking, or one is solid and the other is dark, the beam is broken and the door will refuse to close (and some openers then act erratic on open too). Wipe the lenses with a soft cloth, clear anything blocking them, and gently nudge them until both lights glow steady.
- 5
Test the manual release and feel the door’s weight
With the door down, pull the red emergency-release cord hanging from the opener rail to disconnect the door from the opener, then lift the door by hand a foot or two. A properly balanced door should feel light — around ten pounds — and stay put when you let go halfway. If it slams down, won’t budge, or feels enormously heavy, do not force it: that points to a spring or cable problem, which is a pro-only repair. Re-engage the opener afterward by pulling the cord toward the door and running the opener once.
- 6
Clear the tracks and check for obstructions
Look up and down both tracks for a stray object, a jammed roller, or debris blocking the door’s path. A tennis ball, a bike, or a buildup of grime can stop the door and make the opener reverse. Clear anything in the way. Do not, however, start bending tracks or prying at rollers under tension — a smooth-running door needs everything aligned, and forcing parts can make things worse.
- 7
Reset the opener and try the outdoor keypad
Unplug the opener for 30 seconds and plug it back in to clear a glitched control board — the same trick that fixes a frozen router often revives a confused opener. If you have an outdoor keypad, test it too; if the keypad works but remotes don’t, you’ve narrowed it to the remotes. Still dead after all of this? The opener motor, logic board, or gear may have failed, and that’s the point to call.
When to call a pro
Stop and call a professional immediately if the door feels extremely heavy by hand, hangs crooked or lopsided, has a visible gap in the coiled spring above the door, or you heard a loud bang like a firecracker (the classic sound of a torsion spring snapping). Garage door springs and cables are under enormous tension and can cause serious injury or death — never try to adjust, loosen, or replace them yourself. Also call if the opener hums but the door doesn’t move, a breaker keeps tripping, or the door reverses for no reason after you’ve cleaned the sensors. Those point to a failed motor, stripped gear, or a safety system that needs proper diagnosis.
Get a free quote from a local pro
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Garage Door Won’t Open — FAQ
Why won’t my garage door open but the opener makes noise?
Why does my garage door open a little then stop or reverse?
Is it safe to open a garage door with a broken spring?
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