When the garage door reaches the open or closed limit it stops.
Garage door opens by itself after closing.
The measurement is used to reset the up limit switch on your garage door opener.
Residential electric garage door openers manufactured after 1993 are equipped with two safety mechanisms that operate while the door is closing.
Your garage door is programmed to travel a certain distance before it closes.
When your liftmaster garage door opener opens and closes by itself here are the troubleshooting tips you need to follow.
If your garage door keeps opening by itself after you closed it you may have to adjust your closed limit settings.
When the garage door opens about halfway or 5 feet from the ground and stops the up limit switch needs to be adjusted.
The first is photoelectric and the second is mechanical.
There may also be loose wire connections inside the button housing itself.
Below are three reasons why your garage door opens on its own and some quick fixes you can try.
Here are a few scenarios we ve come across.
As is the case with so many issues at the home there s no one reason why your garage door closes then opens.
Whether you re using the passcode entry the buttons inside the garage or your remote opener the openers and the garage door itself must be on the same frequency.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
This is done with the help of sensors in the motor and on each side of the opening near the floor and mounted on the tracks.
Close the garage door with the opener and watch it closely as it closes.
Remove the bell wire from the single button control station s terminals and operate the garage door opener from the remotes.
In garage door operators made after 1993 there are required safety features that open the door during the close cycle when they detect something blocking the door.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
Here s a rundown of some of the possible reasons this can be happening.
As these wires short against the housing the electrical impulse causes the door opener to activate.
Garage doors use radio frequencies to open and close.
Radio interference causes garage door problems cb radios police radios a nearby radio station or radio tower can also make a garage door open and close on its own.
Disconnect the control station.
If these limits are set too high the door will hit the ground before reaching the closed limit.
The symptom of this is a garage door that is in constant motion opening fully then immediately descending only to start the same cycle again.
There are a few unusual factors that can cause your door open by itself.
Measure the height where the door stops while it is being opened.
Your travel down setting needs to be adjusted.
