How To Fix Liftmaster Garage Door Sensors

Remove existing wires from the white and grey terminals on the back of the operator.

How to fix liftmaster garage door sensors.

The sensors that make garage doors safer must be located in the worst possible place close to the floor. Remove the wires from the wire nuts or cut the sensor wires 12 from the sensors. Reattach the cut wires to the new sensors. If done correctly you ll have disconnected your safety sensors from your garage door.

If you see a blinking light on one of the sensors it means they aren t aligned. Try opening the garage door with the remote and see what happens. Now you can tighten the screw and plug in the opener. Use a pair of wire cutters to cut the white and black wire about an inch from the sensor.

Connect the ends to the terminals on the sensor thread the wires through the fasteners strip the ends and connect the wires to the terminals. Twist together the two white with black stripe wires from both sensors. Connect the two white with black stripe wires to screw terminal 3 on the motor unit. Proceed with both sensors to the garage door opener motor unit.

This video will show you how to align the safety reversing sensors on your garage door opener. If this is the case tighten the bolts with a wrench. Strip 1 2 inch of insulation off the end of the replacement wires. Loosen one of them and adjust it until the light shines steadily.

Twist together the two solid white wires from both sensors. Another reason for the sensors to misalign is that the door track is loose. Electric garage door openers are a great innovation but as is the case with every electric electronic component things can go bad and malfunction. To reconnect the garage door to your liftmaster garage door opener manually close the garage door pull the emergency release handle down.

Now press the remote control. Get the liftmaster garage door support you need from chamberlain group. Strip both ends of wires from each sensor and twist like colored wires together. Strip 7 16 inch of insulation from each solid white and white with black stripe wire on both sensors.