A garage door opener not working always seems to happen at 7:40 in the morning when you’re already late. You press the remote. Nothing. Or the motor hums and the door doesn’t budge. Or the door starts down, stops, and climbs right back up while the light blinks at you. Most of these failures trace back to a short list of causes, and you can rule out the easy ones in about ten minutes with no tools. Here they are in the order a technician would check them, along with the point where a homeowner should stop and call for help.
The short answer: When a garage door opener stops working, check four things in order: power (breaker, GFCI outlet, a 30-second unplug), the controls (lock mode on the wall button, remote battery, remote range), the photo-eye safety sensors (lights flashing 10 times means they’re blocked or misaligned), and finally the door itself. If the motor runs but the door won’t move, the door feels heavy, or you heard a loud bang from the garage, the cause is usually a broken spring or a stripped gear, and that’s a job for a professional.
Why is my garage door opener not working?
A garage door opener stops working for one of four reasons: it isn’t getting power, it isn’t receiving your command, its safety sensors are telling it not to move, or the door it’s trying to lift is fighting back. Every symptom below fits one of those buckets, and figuring out which bucket you’re in is most of the diagnosis.
Two quick questions narrow it down. Does the wall button work when the remote doesn’t? Then the opener is fine and the problem lives in the remote or the lock setting. Does the motor make any sound? Silence points to power. Humming points to something mechanical. A door that moves and then reverses points to the sensors or the limits.
Step one: does the garage door opener have power?
A garage door opener with no lights, no sound, and no response usually has no power reaching it. The motor unit plugs into a ceiling outlet that’s often on a GFCI circuit shared with the rest of the garage, and a tripped GFCI or breaker is one of the most common reasons an opener goes completely dead.
Find the GFCI receptacle on a garage wall (the one with Test and Reset buttons) and press Reset firmly. Check the breaker panel. If you can safely reach the ceiling outlet, plug a phone charger into it to confirm it’s live. If the opener has power but is acting strange, unplug it, wait 30 to 60 seconds, and reconnect it. That’s the “reset” most people are searching for: it clears the logic board on most models without erasing your remotes or limit settings, and it fixes a surprising number of glitches, especially after an outage.
North Texas adds a wrinkle. Spring thunderstorm season brings lightning and power surges, and the logic board in an opener is a circuit board like any other. It doesn’t take a direct strike; a surge on the line can damage the board, and the tell is an opener that worked yesterday and is dead (or behaving randomly) this morning. Chamberlain (which also makes LiftMaster) sells a surge protector for its openers for exactly this reason. If the outlet is live, the power cycle changed nothing, and the wall button is dead, the logic board is the prime suspect. That’s where do-it-yourself troubleshooting ends and garage door opener repair begins.
Why does the wall button work but the remote doesn’t?
When the wall button opens the door but the remote won’t, the opener itself is healthy. The problem is almost always lock mode, a weak remote battery, or radio interference, and all three are fixable in minutes.
Lock mode. Most wall controls have a Lock button (some call it vacation mode). When it’s on, the opener ignores every remote and keypad but still works from the wall, and it gets bumped on by accident. The signs, per Chamberlain’s troubleshooting guide, are the opener lights flashing twice when you press a remote and the wall control’s LED blinking steadily. Press and hold the Lock button until the light stops flashing, then try the remote.
The battery. Current Chamberlain and LiftMaster remotes take a 3-volt CR2032 coin cell; other brands vary, so check inside the cover. A weak battery, not just a dead one, can stop the remote from transmitting. Swap it, match the polarity markings, and look for corrosion on the contacts. If your remote lives on the visor of a car that bakes in a Texas driveway all summer, check the battery first.
Range and interference. Stand directly under the motor unit and press the remote. If it works there but not from the driveway, something is shrinking the signal, and a common culprit is an LED light bulb. Some LED bulbs, including ones screwed into the opener itself, give off radio noise on the opener’s frequency and chop the remote’s range down to a few feet. Chamberlain’s fix is to swap in an incandescent or a bulb rated for garage door openers, then test again.
Why won’t my garage door close, and why is the light flashing 10 times?
A garage door that starts down, stops, and reverses while the opener light flashes ten times has a safety sensor problem. The photo-eye sensors near the floor on each side of the door are blocked, misaligned, dirty, or hit by sunlight. The opener is doing its job: it won’t close on anything it can’t see past.
One sensor sends an invisible infrared beam across the opening and the other receives it. Break that beam while the door is closing and the opener reverses. Every residential opener made for sale in the U.S. on or after January 1, 1993 has to have this kind of secondary entrapment protection under the federal safety standard (16 CFR Part 1211), which is built on UL 325. The sensors sit no higher than six inches above the floor, which is why a rake handle or a leaf pile sets them off.
Look at the sensor LEDs. On Chamberlain and LiftMaster units, the sending eye shows amber and the receiving eye shows green, and both should glow steadily. A flickering or dark green light means the receiver isn’t getting the beam. Clear the path, wipe both lenses with a soft dry cloth (cobwebs and DFW dust do it constantly), then loosen the wing nut on the misaligned sensor, aim the lenses at each other until the light goes solid, and tighten it down.
Sunlight is the sneaky one. If your door faces west and only acts up in late afternoon, the low sun is shining into the receiving eye and washing out the beam. Chamberlain makes a sun-shield kit for its sensors, and a small hood that shades the receiving eye without blocking the beam does the same job.
A detail most guides skip: for years you could force a door closed past a sensor fault by holding the wall button down until the door reached the floor. Chamberlain removed that override from any opener or replacement logic board built after February 3, 2022, so on a newer unit the hold-to-close trick does nothing. The sensors have to be fixed, not bypassed. Never disconnect or tape over them to get the door down.
What does it mean when the opener hums but the door doesn’t move?
A garage door opener that hums, clicks, or strains without moving the door has power and is receiving your command. Something is stopping it mechanically. That something is either inside the opener (a stripped drive gear, a failed start capacitor, or a trolley that’s disconnected from the door) or it’s the door itself, and a door that won’t budge is very often a broken spring.
If someone pulled the red emergency release cord during an outage and never re-engaged it, the motor runs the carriage along the rail without ever grabbing the door. Run one full open-and-close cycle and listen for the click as it reconnects. Chamberlain’s manual operation guide covers the reconnect steps for each rail type.
The stripped gear is the classic failure on older chain-drive openers. The main drive gear is plastic, and after enough cycles (or months of dragging a door with tired springs) its teeth shear off. You’ll hear the motor spin freely and may find plastic shavings under the cover. The gear can be replaced without replacing the opener, but it’s a take-it-apart job.
This is one of the most common things we find on service calls across Dallas-Fort Worth: the homeowner calls about a dead opener, and the actual cause is a broken torsion spring. The opener was never built to lift the door on its own; the springs carry the weight and the motor only guides it. When a spring snaps (often with a bang you can hear from inside the house), the door suddenly weighs far more than the opener can handle, so the motor strains, the door lifts a few inches and drops, or nothing moves at all.
Look at the shaft above the door. A torsion spring with a visible gap in the coils is broken. Slack lift cables or a door that sits crooked in the opening mean the same thing. Stop there. Do not pull the emergency release, do not try to lift the door by hand, and do not touch the spring, the cables, or the bottom brackets. A spring under tension stores enough energy to cause serious injury, and Chamberlain’s own manual-release warning says a door with weak or broken springs can fall rapidly and without warning once the opener is disconnected. Call for garage door spring repair and leave the car where it is.
Why does the door stop or reverse partway through its travel?
A garage door that stops before it’s fully open or reverses before it reaches the floor is usually running into resistance, or its travel and force limits have drifted. The opener senses more effort than it expects and treats it as an obstruction. That’s the safety system working as designed.
Check the tracks for a stray screw, a rock, or a bent section, and look for a roller that’s popped out. Then watch the door move and listen for a spot where it scrapes or hesitates. If it binds in one place, the door hardware is the problem, and turning up the force to push through it is the wrong fix: it hides the real fault and weakens the safety reversal that protects your kids and your car.
Weather moves these settings too. Chamberlain notes that weather conditions affect door movement and that occasional adjustment is normal, and it lists buckling of the garage floor among the events that call for re-setting the limits, which matters on North Texas clay soil. A small limit adjustment usually fixes a door that bounces off the floor in August or won’t quite close after a cold snap. But the force and travel settings are tied to the safety reversal, so we’d rather set and test them than have you guess.
Whatever gets adjusted, retest the reversal afterward. With the door fully open, lay a 2×4 flat on the floor under the center of the door, close it with the opener, and confirm it reverses when it touches the board. Chamberlain’s safety reversal test instructions say to run this check every month. If the door stops on the board instead of reversing, unplug the opener until it’s serviced.
When should you call a professional for a garage door opener that isn’t working?
Call a professional the moment the problem involves the springs, cables, or bottom brackets, when the door is off its track, or when the opener has power but the logic board or gear has failed. Everything else on this page (power, lock mode, batteries, sensor cleaning, the power cycle) is safe for a homeowner.
A few symptoms mean stop right now and make the call:
- A loud bang from the garage, a gap in the spring coils, slack cables, or a door sitting crooked in the opening. That’s a broken spring or cable, and the door can fall.
- You pulled the release cord (with the door closed) and the door is very heavy or won’t stay put. The springs are worn out and the opener was covering for them.
- The door fails the 2×4 reversal test, or the opener is dead after a storm with a live outlet.
Age matters too. Most residential openers last 10 to 15 years, so an early-2000s unit that’s stripping gears is a candidate for opener replacement rather than another repair. And if the door is stuck with your car inside, that’s what emergency garage door repair is for.
Common questions about a garage door opener not working
Why is my garage door opener not working after a power outage?
Check the GFCI outlet and the breaker first, since power events trip them. Then unplug the opener for 30 to 60 seconds and plug it back in. If a surge damaged the logic board, the opener stays dead or acts erratically even with a live outlet, and the board needs to be replaced.
Why does my garage door opener light blink 10 times?
Ten flashes on a Chamberlain or LiftMaster opener means the safety sensors are blocked, misaligned, dirty, or hit by direct sunlight. Clear the path, wipe the lenses, and adjust the sensor until both LEDs glow steadily. Two flashes means the Lock button on the wall control is on.
Can I bypass the safety sensors to close my garage door?
No. The sensors are federally required entrapment protection, and disconnecting or taping over them can let the door close on a person, a pet, or a car. Openers and logic boards made after February 3, 2022 no longer allow the hold-the-button override at all.
Is it safe to pull the red emergency release cord?
Only when the door is fully closed and the springs and cables look intact. Pulling it with the door open, or with a broken spring, can let the door drop. If the door feels very heavy or won’t stay open once disconnected, stop and call a technician.
Why does my remote only work when I’m right under the opener?
Something is shrinking the radio range, and the most common cause is an LED light bulb in or near the opener. Swap it for an incandescent bulb or one rated for garage door openers, replace the remote battery, and test again.
If the door still isn’t cooperating, or you spotted a broken spring and stopped where you should, All Pro Door Repair has been fixing garage doors and openers across Dallas-Fort Worth since 2001. We’re licensed and insured, we offer after-hours emergency service, and estimates are free. Call (972) 624-1515 or schedule an estimate online.