Why does my garage door start to close then go back up?

The opener's safety auto-reverse is being triggered. The most common cause is a blocked or misaligned photo-eye sensor near the floor. Other causes include an obstruction in the track, a bent track section, or a drifted travel-limit setting on the opener.

How do I fix a garage door that won't close all the way?

First, clear any obstruction in front of the floor sensors and clean the sensor lenses. Check that both sensor LEDs are lit steady. Inspect the tracks for debris or bends. If the problem persists, the travel-limit setting or opener logic board may need professional adjustment.

Can I bypass the garage door sensors to close the door?

No. The safety sensors are a required safety feature and bypassing them is dangerous and illegal. If the door will not close with the sensors active, hold the wall button continuously — most openers allow a forced close while the button is held — then call for professional service to diagnose the real cause.

Why does my garage door start to close then go back up?

The opener's safety auto-reverse is being triggered. The most common cause is a blocked or misaligned photo-eye sensor near the floor. Other causes include an obstruction in the track, a bent track section, or a drifted travel-limit setting on the opener.

How do I fix a garage door that won't close all the way?

First, clear any obstruction in front of the floor sensors and clean the sensor lenses. Check that both sensor LEDs are lit steady. Inspect the tracks for debris or bends. If the problem persists, the travel-limit setting or opener logic board may need professional adjustment.

Can I bypass the garage door sensors to close the door?

No. The safety sensors are a required safety feature and bypassing them is dangerous and illegal. If the door will not close with the sensors active, hold the wall button continuously — most openers allow a forced close while the button is held — then call for professional service to diagnose the real cause.

Garage Door Won't Close All the Way? Here's Why

When your garage door starts down, then reverses back up, the opener is doing its job — it detected an obstruction or a misalignment. Here is how to find the cause and what to do.

The short answer

A garage door that starts to close then reverses is almost always a safety sensor issue, a track obstruction, or a travel-limit setting that drifted. The opener's auto-reverse is a built-in safety feature — when something blocks the photo-eye beam or the door meets unexpected resistance, it reverses to avoid damage or injury. The fix depends on which trigger is firing.

Check the photo-eye safety sensors

The two sensors near the floor on each side of the opening shoot an invisible beam across the threshold. If the beam is blocked, misaligned, or dirty, the opener refuses to close. Check that nothing is in front of the sensors — a trash can, a toy, a cobweb. Both sensor LED indicators should be lit steady. If one is blinking or off, clean the lenses with a dry cloth and gently adjust the sensor head until both indicators stay lit.

Inspect the tracks for obstructions

Debris in the vertical track — a pebble, a bent track flange, a loose bolt — can catch a roller and create resistance that triggers reversal. Inspect the full length of both tracks for dents, bends, or obstructions. A track that is bent inward from a vehicle bump will pinch the rollers and needs professional realignment.

Travel-limit drift

The opener's down-travel limit tells it how far the door should travel before stopping. Over time, vibration can shift the limit setting so the opener thinks the door has hit the floor before it actually has, causing a partial close and reverse. Adjusting travel limits is a delicate calibration best done by a technician, as over-travel can cause the door to slam into the floor.

When to call for service

If the sensors are clean and aligned, the tracks are clear, and the door still reverses, the issue is likely a logic board fault, a failing force-sensor, or a limit-switch problem inside the opener. These require diagnostic equipment and are not homeowner-repairable. Call for professional service before the problem worsens.