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.
My chamberlain garage door opener will not close.
There is a short or reversed wire for the safety sensors.
Disconnect your chamberlain garage door opener from the garage door by pulling the emergency release handle down and back towards the garage door.
Inspect sensor wires for a disconnected or cut wire.
The garage door opener will not close and the light bulbs flash.
From informational videos to product manuals and troubleshooting articles the chamberlain group resource library has the information you need.