Inspect sensor wires for a disconnected or cut wire.
My chamberlain garage door opener will not close.
Manually lift the garage door and release it when it is opened halfway when the door is appropriately balanced it will neither move up or down but stay in place supported by the springs.
From informational videos to product manuals and troubleshooting articles the chamberlain group resource library has the information you need.
Safety sensors are not installed connected or wires may be cut.
The garage door opener will not close and the light bulbs flash.
Disconnect your chamberlain garage door opener from the garage door by pulling the emergency release handle down and back towards the garage door.