Garage Door Won’t Close? It’s Almost Always One of Three Things
One of the most common calls we get — and usually narrowed down to a short list once you know what to check.
A garage door that won’t close — either refusing to start moving, or starting and then stopping partway — is one of the more common calls we get, and the good news is the cause is usually narrowed down to a short list once you know what to check.
The three most common causes
How to tell which one you’re dealing with
Stand where you can see both sensor units — if either one shows a blinking rather than solid light, start there; it’s the most likely cause. If both lights are solid and steady, watch the door closely as it attempts to close: if it stops at the same point every time, suspect a track obstruction or binding roller at that location. If it closes partway and reverses upward rather than just stopping, that’s a stronger sign of the sensor or force-setting issue rather than a physical obstruction.
Why this shows up more in certain Corpus Christi neighborhoods
Sensor and force-setting issues both trace back, indirectly, to the same coastal corrosion pattern we see across this climate. Corroded sensor wiring connections cause intermittent faults that look like a working sensor most of the time but fail unpredictably. Roller and track corrosion increases friction gradually, which is exactly what causes a force-setting that was correctly calibrated a year ago to suddenly seem too sensitive today. Homes in Flour Bluff, Padre Island, and along Ocean Drive tend to see both issues develop faster than homes in Calallen or further inland, simply due to the difference in ambient salt exposure.
What we check on a “won’t close” service call
We start with the sensors — alignment, cleaning, and a wiring check — since that resolves the majority of these calls. If sensors check out fine, we move to the force and limit settings, adjusting them to match the door’s actual current resistance rather than an outdated calibration. If neither resolves it, we inspect the full track and roller system for the physical obstruction or binding point causing the issue.
A closing scenario worth mentioning specifically: partial closure at night versus daytime
If your door closes fine during the day but has trouble at dusk or after dark, this is a genuine, recognized pattern rather than something you’re imagining. Some sensor issues are marginal — close enough to working correctly that ambient daylight compensates for a slightly degraded signal, while lower light conditions expose a weak connection or minor misalignment that daylight was effectively masking. This is worth mentioning specifically when you call, since it helps narrow the diagnosis toward a sensor or wiring issue right away rather than a broader mechanical problem.
Why we test the full cycle, not just the failure point
When we’re diagnosing a won’t-close complaint, we run the door through several full open-close cycles rather than just observing the one failure you called about, since some causes — particularly wiring faults — are intermittent by nature and might not reproduce on the very first attempt. This more thorough testing approach takes a few extra minutes but meaningfully reduces the chance of missing an intermittent cause and sending us back out for a repeat call.