Garage door opener troubleshooting, symptom by symptom
Updated 2026-01-09 OpenersTroubleshootingDIY
Before anything else, run the one test that splits every opener problem in two. Pull the red release cord and lift the door by hand. If it is heavy or will not move, the opener is innocent and you have a spring problem. If it lifts easily, read on.
Symptom: motor hums but the door doesn't move
Almost always a stripped plastic drive gear inside the opener head. The motor spins, the gear no longer engages the worm drive, so nothing transfers to the rail. It is a common, inexpensive repair and gear kits are widely available for every major brand. The other possibility is a snapped chain or belt, which is visible at a glance.
Symptom: door closes partway then reverses
Three candidates, in order of likelihood:
- Photo-eye sensors. Look at the small units mounted six inches off the floor on each track. Both indicator lights should be steady. A blinking light means they cannot see each other: misalignment, a cobweb, a bicycle wheel, sun glare or a loose wire.
- Close-force setting. If the door meets slightly more resistance than the opener expects, it treats that as an obstruction. There are adjustment screws or dials on the opener head.
- Actual obstruction. A bent track section, a seized roller or ice at the bottom seal will stop the door and trigger the reversal correctly.
Symptom: door reverses immediately on touching the floor
The down-travel limit is set too far. The opener drives past the point where the door is fully closed, senses resistance from the floor, and reads it as an obstruction. Adjusting the down-limit slightly shorter fixes it. This is a genuinely easy homeowner adjustment.
Symptom: remotes stopped working, wall button still works
Start with the remote battery, even if it "was fine last week." If all remotes fail together and the wall button works, the receiver in the opener head or its antenna wire is the issue. Check the thin antenna wire hangs down freely and has not been tucked up or broken. New LED bulbs in or near the opener are a surprisingly common culprit, because cheap ones emit radio interference that swamps the receiver.
Symptom: nothing at all, no lights, no sound
Power. Check the outlet with something else, check the breaker, and check that the opener plug has not vibrated loose. Also check the wall button wiring: a staple through the low-voltage wire during a garage tidy-up is more common than you would think.
Symptom: opener runs on its own
A stuck wall button, a shorted low-voltage wire, or a remote wedged under something in a car or bag. If it persists after ruling those out, disconnect the wall button entirely and see if it stops. A genuinely faulty logic board can do this and it is a safety issue worth acting on quickly.
Repair or replace?
| Fault | Verdict |
|---|---|
| Photo-eye sensor / alignment | Repair, always |
| Stripped drive gear | Repair if the unit is under ~12 years |
| Limit or force settings | Adjustment, not a repair |
| Broken chain or belt | Repair |
| Failed logic board, unit over 15 years | Usually replace |
| Any opener made before 1993 | Replace on safety grounds |
The 1993 rule
Federal law required photo-eye safety sensors on residential garage door openers from 1993. If your unit predates that, it has no external entrapment protection at all, and no repair makes it compliant. That is the one case where we will recommend replacement regardless of what has failed.
If you have worked through the list and it is still misbehaving, our opener repair service covers every major brand across Michigan, and opener installation if it turns out to be past saving.
Need a hand with this? We cover every city in Michigan, seven days a week. Call (888) 904-6236 or request a callback.