They are usually on the motor housing and you access them by opening a panel or removing the housing cover.
Genie garage door closes then opens again.
Door starts down then stops before it is closed.
You should now be able to operate the door using your genie garage door opener.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
Then manually lift or close the door until the carriage locks into place.
If an operational problem exists and the garage door opener will not close the opener can be forced to close.
The first image shows the genie chain glide carriage position connected and the second image shows the position of the carriage when disconnected.
If you re craftsman chamberlain etc garage door opener is closing and then opening up its likely a common problem related to the stop limit mechanism.
Your garage door s logic board is the brain of your garage door opener.
But one of the more perplexing issues is when the door goes up and down by itself with no help from you.
Most garage door openers have an open and close limit control.
Close the garage door with the opener and watch it closely as it closes.
If the door stops short of closing lengthen the close limit by turning the control knob in the direction indicated usually counterclockwise.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
Press and hold the wall console button until the garage door is completey closed.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
Check garage door for binding.
It goes partway down reverses direction and goes back up again.
How to fix a garage door that keeps reversing.
You push the button to close the garage door.
Get logic board replacement.
If the garage door does not close completely or begins to close and then opens back up again the down limit switch needs.
Genie chain drive carriage.
Check for interference from adjacent photo eye sensors of any brand.
It can seem quite ghostly having your garage door operate with a mind of its own.