Your garage door is a great way to secure your vehicles and belongings, as well as adding an extra layer of security to your house. However, in order for your garage door to accomplish its purpose, it must be completely functioning. One of the easiest ways for a garage door to fail its purpose is when it doesn’t close all the way.
Luckily, a garage door that won’t completely close is usually an easy problem you can fix yourself.
When a garage door doesn’t close all the way, sealing to the floor, usually the problem is with the limit switch. The limit switch is what determines how much your garage door opener will open or close the door. If your door refuses to close all the way, you generally just need to reset your limit switch.
The limit switch is located on the garage door opener motor, usually either on the back of the motor head or behind the light bulb lens cover. You can identify the limit switch by its appearance – two white knobs with a slot.
Once you are up near the limit switch (usually a step ladder is required), ask someone to push the button that opens the garage door. Once the door is up, insert a screwdriver into the slot and start moving the knobs.
With the limit switch, a clockwise rotation will increase the travel of the door and a counterclockwise rotation will decrease the travel of the door. A full turn of the knob will result in a 3-inch adjustment (i.e. the door will travel 3 inches more or 3 inches less). One of the knobs is the open limit (i.e. how far up your door will rise) and the other is the down limit (i.e. how far down your door will close).
It is recommended that you turn the knob is small increments, testing the door in between rotations. The goal of your adjustments is to have your garage door close completely, creating a seal with the floor. If you have the door travel too far down, you will trigger the safety force, which will automatically cause the door to reopen. Alternately adjust the knob and test the door until you have reached the correct distance.
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