A garage door that won’t close usually comes down to one of four things: a bent track, a broken cable, a misaligned safety sensor, or a spring that’s lost its tension. At Pensacola Garage Door Crew, we get calls almost every week where the homeowner assumes the worst (a full door replacement) when the fix is a $40 sensor bracket or a track adjustment that takes twenty minutes.
Why Doors Jump the Track
Tracks don’t usually fail on their own. Something pushes the door into them first. A car bumper, a rolling toolbox, or years of the door running slightly crooked will eventually bend the vertical rail enough that the rollers can’t stay seated. Once a roller pops loose, the door binds, jerks, or stops mid cycle. In older homes near the coast, we also see track brackets that have loosened from humidity and salt air working on the mounting screws over time. That’s a maintenance issue, not a manufacturing defect, and it’s usually preventable with an annual hardware check.
| Symptom | Likely Cause | Typical Fix |
|---|---|---|
| Door stops and reverses before touching the floor | Misaligned or dirty photo eye sensors | Realign brackets, clean lenses |
| Door hangs crooked, one side lower | Broken cable or uneven spring tension | Cable replacement, spring adjustment |
| Door won’t move at all, opener hums | Broken torsion spring | Spring replacement (both, if original pair) |
| Roller visibly outside the track | Bent track or worn roller | Track straightening or section replacement |
| Door closes then reopens immediately | Obstruction sensor or opener force setting | Adjust force limits, inspect track for debris |
Not every “won’t close” call is mechanical. Sometimes it’s the opener logic itself. Chamberlain and LiftMaster units, which we install often, run a self diagnostic that will refuse to close the door if the safety sensors report even a brief interruption. Homeowners sometimes chase a track problem for a week when the real fix is re-aiming a sensor that got bumped by a stored bike.
What We Check First
- Sensor alignment and wiring at the base of each track
- Cable tension on both sides of the door
- Roller condition, since nylon rollers wear out faster in humid climates
- Track bracket screws and wall plates
- Spring winding and balance
Doors from Clopay, Amarr, and Wayne Dalton all use slightly different roller and track spacing, so a bracket or roller pulled from the wrong parts bin will bind even on a straight track. We stock hardware matched to what’s actually on your door instead of forcing a generic part.
DIY or Call a Pro
Realigning a sensor is safe to try yourself: loosen the wing nut, nudge the bracket until the indicator light stops blinking, retighten. A bent track or a broken cable is a different situation. The door is under spring tension even when it looks still, and a cable that lets go while someone is working near it can cause a serious injury. If the fix involves anything past the sensors, that’s the point to call someone who does this daily.
We run service calls throughout the Pensacola area and typically diagnose the issue on site before quoting repair versus replacement, so you’re not paying for guesswork.