Garage Door Not Closing Light Flashing Liftmaster

An open door will not close if the infrared beam is broken.

Garage door not closing light flashing liftmaster.

If the opener cannot detect that the safety sensors are properly working or connected then the opener lights will flash and the door will refuse to close. My chamberlain liftmaster garage door opener light fixture flashes and will not close when using remote. Eliminate any item in between the sensors. You may want to check the back of the motor unit.

To troubleshoot your liftmaster safety sensors. 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 main light will blink 10 times indicating a problem. The sensors appear to be working as the sending and receiving led glow steadily.

The led on the motor will also blink and serves as a diagnostic tool for troubleshooting. The back of the motor has a circuit board with a service light as well. The liftmaster garage door opener lights will flash for ten times. When the safety sensor is not properly aligned or something is obstructing the light beam the garage door will fail to close.

Led is not lit on door control. Door will close if i press and hold button on wall. Align sensors if the indicator lights glow replace the wires for the sensors. If your garage door sending sensor is showing a yellow light and the other does not show a green light it is likely they are misaligned.

The lock button on the door control in on. Check if something is blocking the way of the safety sensor. 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. If necessary you can close the garage door by pressing and holding the door control push bar until down travel is completed.

Garage door light flashing but won t close. Inspect door control wires for a short staple in wire replace as needed. Liftmaster motors will not operate when something obstructs the infrared beam between the safety sensors at the bottom of the garage door tracks. You ll need to hire a professional to replace the wiring entirely or check to see if the wire disconnected from the opener and reconnect it.

Garage door sensor locations.