Garage Door Opener Not Working: A Diagnosis in Order
Work through it in order — power, then trolley, then gear, then board. Two of the four steps are free, and a surprising number of "dead openers" are back in service in five minutes.
What is causing it
Ranked by how often we actually find each one. Work down the list — the first two or three cover the large majority of cases.
1. No power at the outlet
Tripped GFCI, unplugged unit, or a breaker that went during a storm. Free to check and embarrassingly common.
→ Reset the GFCI, check the breaker, confirm the plug.
2. The trolley is disconnected
The red release cord has been pulled. The motor and chain run normally; nothing is attached to the door.
→ Close the door, pull the cord toward the door, cycle the opener until it clicks back in.
3. A stripped drive gear
Motor runs at full speed with a grinding note, door does not move. The nylon gear has shredded — the single most common mechanical opener failure.
→ Gear kit — $129–$290. Worth it on any decent unit under ten years old.
4. A failed capacitor
The motor hums but will not start turning. Usually a $20 part and a $150 visit.
→ Capacitor replacement.
5. A dead logic board
No response at all from wall button or remote, or nonsense LED behaviour. Storm surges are a frequent cause in Houston.
→ Board replacement, or full unit replacement if the opener is old.
6. Broken springs, not a broken opener
The opener strains and stops because it is being asked to lift the entire door. The opener is fine; the door is not.
→ Spring replacement — check this before buying a motor.
What you can safely check yourself
- Try the hardwired wall button. If the wall button works and remotes do not, it is remotes, not the opener.
- Check the GFCI outlet and the breaker.
- Watch the trolley while someone presses the button — if the chain moves and the trolley does not, the gear is stripped.
- Pull the release cord and lift the door by hand. Heavy or immovable means the springs are your real problem.
- Note the LED blink pattern on the motor head — every brand publishes a code chart and it names the fault.
⛔ Where to stop
If the door will not lift by hand, stop diagnosing the opener. You have a spring problem wearing an opener costume, and running the motor against it will destroy the motor too.
What it costs to fix in Houston
Most repairs for this problem land in the $129 – $700 range. You get a flat number in writing before we start, and it does not change once we are working. Our full published price book is on the pricing page.
The service that fixes this is Garage Door Opener Repair & Installation — $129 – $650, typically 60–120 minutes on site.
Getting it sorted
We hold same-day slots across Greater Houston every day, and we run 24/7 for emergencies. Call (713) 555-0142, tell us what the door is doing, and we will give you a real arrival window plus a good idea of the cost before anybody drives anywhere.
Garage Door Opener Not Working — questions
Should I repair or replace my garage door opener?
Under ten years old with one failed part — repair, $129 to $290. Over fifteen, or a dead logic board, or no rolling-code security — replace, $420 to $950 depending on drive type. Anything pre-1993 has no auto-reverse safety and should be replaced regardless.
Why does the motor run but the door not move?
Either the trolley is disconnected from the door or the drive gear has stripped. Both are visible in ten seconds if you watch the trolley while the motor runs.
How long should an opener last?
Ten to fifteen years typically. Houston garages run hot, which shortens gear and board life, and a door that has been out of balance for years will take the opener down with it well before that.
Stop guessing. We will tell you.
Describe the symptom on the phone and we will usually name the cause before we leave the shop.
