Liftmaster Garage Door Safety Sensor Troubleshooting

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.

Liftmaster garage door safety sensor troubleshooting.

Liftmaster garage door openers troubleshooting support get the liftmaster garage door support you need from chamberlain group. Here s how to tell if garage door sensor is bad five things to check. If the garage door opener lights don t blink and it is a new installation. The door reverses for no apparent reason and garage door opener lights don 7 blink.

Liftmaster motors will not operate when something obstructs the infrared beam between the safety sensors at the bottom of the garage door tracks. Other signs include flashing garage door opener lights missing sensor light or flashing sensor lights. 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. Safety sensors are critical components of most automatic garage doors.

This video takes you from my problem description to a successful repair all for under 24 00 u s. 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. My liftmaster garage door stopped closing the normal way. Troubleshooting a liftmaster opener with a flashing light involves inspection of the safety reverse sensing system.

For an existing installatio. Repeat the safety reverse test after the adjustment is complete. Whether you have a belt drive chain drive or wall mount model find helpful resources manuals videos and more to help you diagnose and fix the problem. 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.

If the garage door opener lights blink check the safety reversing sensor. An open door will not close if the infrared beam is broken.