Why does my garage door close all the way and then open back up?

Two systems can send the door back up

Modern openers have two independent reversal paths. The photo eyes near the floor reverse the door the instant the beam breaks, no questions asked. Separately, the motor watches how hard it is working; if resistance spikes before the travel limit is reached, it assumes an obstruction and reverses. A door that closes and pops back up has triggered one of the two, and telling them apart narrows the repair immediately.

The quick test: watch the opener's light. Most units flash a diagnostic pattern when the photo eyes cause the reversal, and stay steady when the force sensor did. Your manual maps the blink codes, and what a blinking opener light means covers the common ones.

Check these in order

• Sensor LEDs. Both steady means aligned. One flickering means a bracket has drifted — common when a bike or a trash can nudges it. Height matters too; see how high garage door sensors should sit.
• Down travel limit. Set past the floor, the opener keeps pushing after landing and reads its own force as an obstruction. Adjustment steps are in setting opener travel limits.
• The last foot of track. Red dust, a stray screw, or a bent lower track section stops the door short. Cleaning the tracks rules this out cheaply.
• The bottom seal and slab. A seal gone rigid in the cold, or a slab that has heaved, gives the door a real obstruction to find. This is why the problem often appears in January and vanishes in March.

The seasonal version of this problem

We get a wave of these calls on the first hard freeze every year. Rubber bottom seals stiffen, water under the seal freezes to the slab, and the door meets resistance it did not meet in October. Nothing is broken; the door is correctly refusing to crush ice. The related failure mode — a door that will not break free at all — is covered in what to do when a garage door is frozen shut.

The summer counterpart is sun on the sensor lens, which washes out the receiver and causes reversals at a specific time of day. If your door only misbehaves in late afternoon, read why a garage door will not close on sunny days before you change any settings.

What not to do about it

Do not disable the sensors, and do not tape the emergency release down to hold the door shut. Both remove the protection that is currently working correctly, and the door will still be fighting whatever it was fighting. Cranking close force up has the same problem — covered in more depth in our guide to doors that reverse in the final inches.

If sensors, limits, and track all check clean, the remaining suspect is door balance, and that means springs. A technician can test it in a few minutes with the opener disengaged. Our opener repair team works the whole OKC metro and quotes free.