The garage door opener will not close and the light bulbs flash.
My chamberlain garage door opener will not close.
Safety sensors are not installed connected or wires may be cut.
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.
Inspect sensor wires for a disconnected or cut wire.
The garage door opener will not close and the light bulbs flash.
There is a short or reversed wire for the safety sensors.