Liftmaster Garage Door Starts To Close Then Opens

If the garage door does not close completely or begins to close and then opens back up again the down limit switch needs to be adjusted.

Liftmaster garage door starts to close then opens.

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. Liftmaster uses the protector system which projects an invisible light beam across the door opening and automatically opens the door if something someone crosses it s path. To test for balance open your door s emergency release handle and open and. When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.

Measure the distance of the gap from the bottom of the. Most garage door openers have an open and close limit control. As these wires short against the housing the electrical impulse causes the door opener to activate. Disconnect the control station.

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. 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. Your garage door s logic board is the brain of your garage door opener. Get logic board replacement.

When your liftmaster garage door opener opens and closes by itself here are the troubleshooting tips you need to follow. Garage door only travels a little way and then reverses does your garage door only travel a little way 6 inches or so and then reverse. They are usually on the motor housing and you access them by opening a panel or removing the housing cover. Remove the bell wire from the single button control station s terminals and operate the garage door opener from the remotes.

Years ago garage door openers were required to utilize safety sensors to prevent doors from closing on small children. We design and engineer residential garage door openers commercial door operators and gate entry systems. Chamberlain group cgi the corporate parent company to liftmaster chamberlain merlin and grifco is a global leader in access solutions and products. There may also be loose wire connections inside the button housing itself.