Liftmaster Garage Door Safety Sensor Troubleshooting

Safety sensors are critical components of most automatic garage doors.

Liftmaster garage door safety sensor troubleshooting.

The sensors detect obstructions in the path of a closing garage door and. An open door will not close if the infrared beam is broken. Liftmaster motors will not operate when something obstructs the infrared beam between the safety sensors at the bottom of the garage door tracks. For an existing installatio.

To prevent the garage door from injuring someone in the door or damaging an item in the way of the door all models of liftmaster garage door openers come installed with a safety sensor. Other signs include flashing garage door opener lights missing sensor light or flashing sensor lights. Repeat the safety reverse test after the adjustment is complete. 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.

If the garage door opener lights blink check the safety reversing sensor. Liftmaster garage door openers troubleshooting support get the liftmaster garage door support you need from chamberlain group. Okay now that you know some of the common signs of garage door sensor malfunction you re ready for the next step troubleshooting. My liftmaster garage door stopped closing the normal way.

The door reverses for no apparent reason and garage door opener lights don 7 blink. If the garage door opener lights don t blink and it is a new installation. Troubleshooting a liftmaster opener with a flashing light involves inspection of the safety reverse sensing system. For the door to close correctly without reversing the safety sensors need to be aligned perfectly and there should be nothing in the way of the light beam.

Here s how to tell if garage door sensor is bad five things to check. The sensors connect to the opener by a length of 16 gauge wire and the opener itself usually gets its power from a 120 volt circuit in the home s electrical system via a 12 gauge plug.