Garage Door Won’t Open? 12 Common Causes + What You Can Safely Check Before Calling

When a garage door won’t open, the cause is usually something simple — but forcing the door can turn a small issue into an expensive repair. Here are the 12 most common causes we see in Houston, plus quick checks you can safely do before you call.

Quick Safety Rule

If the door is crooked, stuck halfway, or you hear a loud bang earlier today: stop. Don’t keep pressing the opener.

12 Common Causes

1. Dead remote / keypad battery
   Safe check: Try the wall button inside the garage. If wall button works, it’s remote/keypad power or programming.
2. Vacation / lock mode is on (wall control)
   Some wall buttons have a “lock” feature that disables remotes.
   Safe check: Look for a lock icon or “hold lock” button on the wall control.
3. Something blocking the safety sensors
   If sensors don’t “see” each other, the door may not close (or may reverse).
   Safe check: Remove anything in the path. Wipe both sensor lenses. Confirm both sensor lights are solid.
4. Sensor misalignment (bumped or moved)
   Safe check: Look at both sensor lights. If one is off/blinking, gently realign until both are solid.
5. Disengaged opener (emergency release pulled)
   If the red release cord was pulled, the opener won’t lift the door.
   Safe check: If the trolley is disconnected, reconnect it (you may need to run the opener once to re-latch).
6. Breaker tripped / opener has no power
   Safe check: Confirm opener outlet has power. Check the garage GFCI outlet and reset if tripped.
7. Door is locked (manual lock engaged)
   Some doors have a center handle/slide lock.
   Safe check: Verify the manual lock bar isn’t engaged.
8. Track obstruction (something physically blocking the rollers)
   Safe check: Look along both tracks for debris, a bent spot, or a roller jam.
9. Off-track door (rollers out of track)
   Usually the door looks crooked or stuck.
   Safe check: Do not force it. This is a service call.
10. Broken spring (most common “sudden” failure)
    Often you’ll hear a loud bang and then the door feels extremely heavy.
    Safe check: Look above the door for a visible gap in the torsion spring. Don’t try to lift the door with the opener.
11. Snapped/frayed cable
    Door may jam crooked and won’t lift evenly.
    Safe check: If one side looks higher than the other, stop using it.
12. Opener force/gear issues (hums, clicks, or stops)
    If the opener hums but the door doesn’t move, it could be internal gear/logic/force settings — or the door is too heavy due to a spring problem.
    Safe check: Disconnect the opener and try lifting the door by hand only if it’s not jammed/crooked. If it’s heavy, it’s a door/spring issue, not “just the opener.”

When to Stop Troubleshooting and Call

Call a pro if:

• Door is crooked/off-track
• Door won’t lift by hand (feels heavy)
• You see a broken spring or cable issue
• Opener is straining, grinding, or repeatedly reversing