With the diagnostic feature on craftsman you can know what exactly the issue is.
Garage door will not close light on.
For the door to close correctly without reversing the safety sensors need to be aligned perfectly and there should be nothing in the way of the light beam.
Garage door won t close light flashes.
When you see you garage door opener lights flashing and the garage door will not close it could be the lock button or the safety reversing sensors.
There are a few things which can cause this.
The table below shows how to identify the issue with the diagnostic.
If necessary you can close the garage door by pressing and holding the door control push bar until down travel is completed.
Sometimes the fix can be as simple as replacing the batteries in the opener.
Garage doors sometimes seem to have a mind of their own often deciding when and how far they want to open or close.
Start by checking if.
When the garage door does not close and the lights flashes it means the problem is with the safety sensor.
If anything interrupts this beam of light the garage door will not close and the ceiling light on the opener mechanism will flash as mentioned in the previous step.