Liftmaster Garage Door Starts To Close Then Opens

In some cases faulty springs or incorrect balance inhibit your liftmaster from opening the garage door all of the way.

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. This brain can wear out in time so you could need a replacement. When the logic board wears out it can cause your garage door to close then open and vice versa without explanation. Your garage door s logic board is the brain of your garage door opener.

If the door stops short of closing lengthen the close limit by turning the control knob in the direction indicated usually counterclockwise. 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. Chamberlain group cgi the corporate parent company to liftmaster chamberlain merlin and grifco is a global leader in access solutions and products. Remove the bell wire from the single button control station s terminals and operate the garage door opener from the remotes.

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. Years ago garage door openers were required to utilize safety sensors to prevent doors from closing on small children. As these wires short against the housing the electrical impulse causes the door opener to activate. When your liftmaster garage door opener opens and closes by itself here are the troubleshooting tips you need to follow.

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. Most garage door openers have an open and close limit control. Measure the distance of the gap from the bottom of the. 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.

There may also be loose wire connections inside the button housing itself. Get logic board replacement. Disconnect the control station. We design and engineer residential garage door openers commercial door operators and gate entry systems.