Door Reaches the Ground and Goes Back Up
You might be scratching your head after the door comes down and suddenly returns upright. If this issue affects your door, take a look at the open- and close-limit settings of your door.

These settings describe the height of the ground to the door. Improperly programmed height values can place the ground as lower than its actual position. When the door hits the ground, it thinks, "Oh, I'm about to crush an object. I'd better go back." The automatic reverse prevents a door from closing on objects, so it returns to its upright position.

To deduce if your garage door suffers from ground miscalculation, just check what the height settings describe. Some units’ settings are difficult to locate. If you have trouble finding them, read the owner's manual or look online.

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