Work through these 10 steps in order: wall button, battery, power, error codes, sensors, manual lift test, spring check, cable check, track check, disconnect lever. Steps 1-5 are DIY-safe. If the manual lift feels extremely heavy (Step 6), stop. The spring is probably broken and needs professional repair.
Key Takeaways
- Try the wall button first. If it works, the issue is the remote or its receiver.
- A fresh remote battery fixes 15-20% of 'broken opener' calls.
- If the door is heavy when lifted manually, stop. That's a broken spring.
- Check safety sensors. A blinking light on either sensor means they're misaligned or dirty.
- Off-track doors and broken springs are not DIY-safe. Stop and call.
- Most Houston opener issues are resolved same day. Don't delay if your car is trapped.
Step 1: Check the wall button
Try the wall-mounted button inside the garage (not just the remote). If the door opens from the wall button but not the remote, the issue is with the remote or its receiver, not the opener itself.
Step 2: Replace the remote battery
Before assuming anything is broken, put a fresh battery in the remote. This fixes the problem more often than you'd expect. A bad battery can cause intermittent operation that mimics more serious issues.
Step 3: Check if the opener is plugged in
Check the outlet the opener is plugged into. Try a different device in the outlet to confirm it has power. Also check your breaker box for a tripped circuit.
Step 4: Look for error codes on the opener
Most LiftMaster, Chamberlain, and Genie openers have a blinking light on the motor unit that indicates error codes. Check your owner's manual for what the blink pattern means.
Step 5: Check the safety sensors
The two small sensors at the bottom of the door tracks (one emits a beam, one receives it) will prevent the door from closing if misaligned or dirty. Check for a blinking light on either sensor. Wipe the lenses and check alignment.
Step 6: Pull the red release cord and try lifting manually
Disconnect the opener by pulling the red cord, then try to lift the door by hand. If it lifts easily, the issue is with the opener. If it feels extremely heavy, the spring is almost certainly broken.
Reality Check
Step 7: Check the spring
Look at the spring above the door. Is there a visible gap in the coil? That's a broken torsion spring. Stop. Don't operate the door manually or with the opener. Call for service.
Heads Up
Step 8: Check the cables
Look at the lift cables running from the bottom corners of the door up to the drums on the spring shaft. Slack cables, frayed cables, or a cable off its drum means the cable system needs service before operating the door.
Step 9: Check the tracks for obstructions
Walk both sides of the door tracks and look for bends, dents, objects, or debris. A minor track dent can sometimes be gently tapped back into alignment with a rubber mallet. Major bends need professional attention.
Step 10: Check the disconnect lever
The red release cord disconnects the opener from the door. Occasionally this lever doesn't re-engage properly after being pulled. Look for a small lever or clip near the trolley on the drive rail. It may need to be manually re-engaged.
DIY-Safe vs. Call a Pro: Quick Reference
| Factor | DIY-Safe | Call a Professional |
|---|---|---|
| Dead remote battery | Replace it. Takes 2 minutes. | Not needed. |
| Opener unplugged or tripped breaker | Check outlet and breaker box. | Not needed. |
| Sensor misalignment | Realign sensors: 5 min job. | Only if sensors are damaged or wiring is bad. |
| Broken spring | Dangerous. Stop. Spring is under high tension. | Required. Same-day spring replacement. |
| Snapped cable | Do not operate the door. Cable tension risk. | Required. Cable + drum inspection. |
| Off-track door | Do not force it. Risk of collapse. | Required. Track realignment + safety check. |
| Frozen door (winter) | Break ice seal with gentle lift. Heat gun optional. | Only if door or frame is damaged. |
| Damaged motor unit | Check for error codes on the motor. | If gears are stripped or motor seized. |
Pro Tip
Related: Garage Door Repair | Spring Repair | Opener Repair | 24/7 Emergency Service