Liftmaster Garage Door Starts To Close Then Opens

Remove the bell wire from the single button control station s terminals and operate the garage door opener from the remotes.

Liftmaster garage door starts to close then opens. 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. Disconnect the control station. As these wires short against the housing the electrical impulse causes the door opener to activate.

Measure the distance of the gap from the bottom of the. They are usually on the motor housing and you access them by opening a panel or removing the housing cover. 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. 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.

To test for balance open your door s emergency release handle and open and. Years ago garage door openers were required to utilize safety sensors to prevent doors from closing on small children. 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. 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.

When the logic board wears out it can cause your garage door to close then open and vice versa without explanation. In some cases faulty springs or incorrect balance inhibit your liftmaster from opening the garage door all of the way. There may also be loose wire connections inside the button housing itself. If the door stops short of closing lengthen the close limit by turning the control knob in the direction indicated usually counterclockwise.

This brain can wear out in time so you could need a replacement. Most garage door openers have an open and close limit control. 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. Get logic board replacement.