The Best Why Does My Electric Garage Door Opening By Itself Ideas. Malfunctioning sensors can be caused by a blockage, dirty eyes, loose wires, or just. More often than not, when a garage opens or closes by itself, it may be because of a faulty circuit board.

Sometimes, it’s damage from weather. Weather is frequently the culprit of causing your garage door to keep opening on its own. There are a few reasons why a garage door goes up by itself.