Liftmaster Garage Door Opener Not Closing

The safety reversing sensors must be installed and aligned correctly before the garage door opener will move in the down direction.

Liftmaster garage door opener not closing.

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. The typical liftmaster opener system the door opener itself is in a casing mounted on the garage ceiling or wall. On a security 2 0 garage door opener with an lcd display the lcd display will show error code 4 1 excessive closing force detected to indicate that an obstruction binding or a sticking door was detected. Garage door light flashing but won t close.

Common reasons your garage door opener may not be working properly. If necessary you can close the garage door by pressing and holding the door control push bar until down travel is completed. The safety sensors are out of alignment. Inspect sensor wires for a short staple in wire correct wiring polarity black white wires reversed broken or disconnected wires replace attach as needed.

The track is not aligned properly. Remove sensors from brackets and shorten sensor wires to 1 2 ft. The springs are broken. The protector system safety reversing sensors years ago garage door openers were required to utilize safety sensors to prevent doors from closing on small children.

The door needs lubrication. Disconnect all wires from back of garage door opener. On either side of the track near the floor you ll find a pair of led safety sensors that stop the door from moving when something is in the door opening. The lock button on the door control in on.

Liftmaster garage door openers troubleshooting support get the liftmaster garage door support you need from chamberlain group. When you see you garage door opener lights flashing and the garage door will not close it could be the lock button or the safety reversing sensors. The garage door opens but won t close. If you own a wall mount garage door opener like the liftmaster 8500 for example the first thing to check is the cable.

When the light beam is obstructed or the safety reversing sensors are misaligned the garage door will reverse while closing and the garage door opener lights will flash ten times. The batteries in the remote control need to be replaced. The garage door s path may be blocked.