Garage Door Opener Sensor Trouble Shoot

Find error code on motor unit.

Garage door opener sensor trouble shoot.

Remove the bell wire from the single button control station s terminals and operate the garage door opener from the remotes. Garage door opener won t open all the way fix. Your final option is to get in touch with a garage door expert to fix the problem for you. If the green light is off realign the safety sensors until the green light turns on then try closing the door.

Replace the main gear drive if the garage door opener makes a grinding noise but the door doesn t move your main drive gear is probably toast. If this solves the problem then the control station is faulty or there is a short circuit in the wire. The main drive gear is the plastic gear that comes in direct contact with the worm drive gear on the motor. When your liftmaster garage door opener opens and closes by itself here are the troubleshooting tips you need to follow.

This is not a common problem at all but it could happen. Disconnect the control station. Inspect each sensor to make sure the green or red power indicator lights are illuminated. Ensure that the wires are properly connected and not loose at both connection sites.

The safety sensors may have wire connection problems at the sensor port or at the opener s motor head.