Garage Door Won't Close? The 5 Most Common Causes

A door that opens fine but refuses to close is one of the most common calls we get, and often one of the cheapest fixes. Here’s the list we run through, in the order we check it.

1. Blocked or misaligned safety sensors

The photo-eyes near the floor on each side of the door must see each other. A bike pedal, a leaf, cobwebs, or one eye knocked out of line makes the door reverse the moment it starts down (usually with flashing opener lights). Safe to check yourself: clear the beam path and gently re-aim the eyes until their indicator lights hold steady.

2. Sunlight on a sensor

Low, direct Texas sun can blind one photo-eye at certain hours, so the door closes fine in the evening but refuses at 8 AM. Shade the affected eye with your hand to test; a small sun shield or slight re-aim fixes it.

3. Travel limits or force settings drifted

If the door closes fully and then pops back open, the opener thinks it hit something. Limit and force settings drift with age and temperature. Small adjustments are in your opener’s manual, but repeated drifting is a symptom worth a professional opener look.

4. Bent track or seized rollers

If the door starts down, then jerks, binds, or sits crooked, stop. A bent track or a seized roller makes the opener give up mid-travel, and forcing it makes the bend worse. That’s a cable and roller repair visit, and it’s usually quick when it hasn’t been forced.

5. A failing spring

A door that’s suddenly very heavy for the opener (strains, hums, gives up) often has a weakened or broken spring, and the opener isn’t designed to lift the door alone. Check our guide to spring life, and don’t keep cycling it; that’s how openers burn out too.

Rule of thumb: sensors and sunlight you can check yourself in two minutes. Anything involving tracks, cables, springs, or repeated opener strain is a call, and we’ll tell you honestly on the phone whether it sounds like a $0 fix or a real repair.