Garage Door Opener Not Working? 7 Causes & How to Fix Them

Before you call anyone, try the seven checks in this guide. About 60% of the time you'll fix it yourself in under 5 minutes. For the other 40%, you'll know exactly what to tell us when you call — which makes the whole service call faster and cheaper.

This is the exact diagnostic flow we use on the phone with customers in Bellevue, Kirkland, Redmond and Everett. Work through it in order — each cause is ranked by how often we see it.

Cause 1: Dead remote batteries

Symptom: The wall button inside the garage works, but the remote in your car doesn't do anything.

Self-check: Press the wall-mounted button. If the door operates normally, the problem is the remote. Slide the battery case open (usually a small slot or clip on the back) and swap the battery. Most remotes use CR2032 coin cells or A23 cylindrical batteries — both are at any hardware store for a few dollars.

Still broken after new battery? Try re-pairing the remote to the opener. Open the back of the opener motor unit on the ceiling, press and hold the “learn” button until the LED turns on, then press your remote button within 30 seconds. Your opener manual has the exact sequence.

Cause 2: Power outage or tripped breaker

Symptom: Nothing happens — no motor sound, no lights, no response from the wall button.

Self-check: Look up at the opener motor unit on the ceiling. Are the small LED lights on? If not, walk to your breaker panel and check for tripped breakers (usually labeled “garage” or “outlet”). Flip it fully off, then back on. Also check that the opener is actually plugged in — the cord runs to an outlet on the ceiling near the motor. Gravity and vibration can loosen it over time.

Seattle-specific: We get a spike in these calls after every winter storm. If you just had a power event, give the opener a full 30 seconds to reboot after power returns before testing.

Cause 3: Blocked or misaligned safety sensors

Symptom: The door starts to close, moves 6–12 inches, then reverses back up. Or the opener lights blink repeatedly.

Self-check: Look at the two small photo-eye sensors about 6 inches above the floor, one on each side of the door. Each should have a small LED. Both LEDs need to be solid (not blinking) for the door to close.

• LED is off: Something is blocking the beam — a leaf, a box, a bike pedal, a pet. Clear the path.
• LED is blinking: Sensors are out of alignment. Wipe each lens clean, loosen the wingnut on the bracket, and wiggle the sensor until the LED turns solid.
• Both LEDs off even with nothing blocking: Check that the sensor wires haven't been pulled loose.

Cause 4: Manual lock or vacation mode engaged

Symptom: Opener runs for a second and then beeps or stops. Or, nothing at all. On some models, a flashing indicator shows “locked” status.

Self-check: Look at the wall control panel inside your garage (not the remote). Most modern units have a small lock button or slider. If the light next to it is on, press the button once to disengage. LiftMaster and Chamberlain controls often call this “vacation mode” or “lockout.” It's easy to hit by accident.

On Genie and older models, check for a physical slide lock on the inside of the door itself — the kind you can engage manually from the garage side. If it's locked, the opener will refuse to move the door.

Cause 5: Lost remote programming after power surge

Symptom: Wall button works, remote has fresh battery, but remote still doesn't pair.

Self-check: Power surges and lightning strikes (both common in PNW winters) can wipe the opener's memory of paired remotes. Re-pair the remote:

• Find the “learn” button on the back of the motor unit (usually under a light cover)
• Press and hold until the LED next to it turns on
• Within 30 seconds, press the remote button you want to use
• The opener will click or flash to confirm the pairing

If you have multiple remotes, each needs to be paired separately. Same process for wireless keypads.

Cause 6: Broken spring (opener can't lift the door)

Symptom: The opener motor runs and strains, the door might move 6 inches then stop, or the door doesn't move at all while the motor works hard. You may have heard a loud bang earlier in the day — that's the spring snapping.

Self-check: Look at the horizontal bar directly above the closed door. You should see one or two coiled springs wrapped around it. A clean 2–3 inch gap in the middle of a spring is a clean break. The door will also feel extremely heavy if you try to lift it manually (don't — it weighs 200+ lbs without spring support).

This is not a DIY fix. A full explanation is in our broken spring guide, along with replacement costs and what to expect from a service call.

Cause 7: Drive gear, belt, or motor failure

Symptom: Opener motor makes a loud grinding, whirring, or buzzing noise, but the trolley (the thing that pulls the door) doesn't move. Sometimes you'll see the trolley moving without the door — that means the trolley is disconnected or the belt/chain broke.

Self-check: Look at the ceiling-mounted rail running from the motor to the door. On a chain drive, can you see the chain? Is it on the sprocket? On a belt drive, is the belt intact and tight? Listen for the motor — a grinding noise usually means a stripped plastic drive gear (the #1 failure mode in 10+ year old LiftMaster and Chamberlain units).

What this usually means:

• Stripped drive gear ($120–200 repair on older openers)
• Broken belt or chain ($150–250 replacement)
• Failed motor or circuit board — often cheaper to replace the whole opener ($350–550 installed)

We carry the common parts on the truck and can usually fix or replace the unit the same day.

When it's time to stop troubleshooting and call

Call a technician if you've confirmed:

• Power is working, sensors are aligned, lock is off
• Remote and wall button both fail to operate the door
• You hear grinding, buzzing, or clicking from the motor
• You see a visible gap in a spring or dangling cable
• The door is crooked, stuck, or won't stay where you leave it
• Anything involves the door falling, jumping off track, or moving unexpectedly

Most Seattle-area opener repairs we handle are same-day, and most cost between $150 and $400. Complete replacements run $350–$550 installed including haul-away of the old unit.

What to do next

Walk through the seven causes in order. If you get to #6 or #7 — or if you're not sure which cause matches your symptoms — take one photo (or a 10-second video) of the opener and door and text it to (425) 203-7777. We'll tell you within 5 minutes whether it's a 10-minute fix you can do yourself or a service call.

For more on the DIY/pro boundary, see what you can fix yourself and what to leave to a pro.