Your garage door s logic board is the brain of your garage door opener.
Garage door close then open up again.
Turn the down limit switch screw clockwise one turn with a flat blade screwdriver if the garage door closes and then begins to open back up.
Sometimes the sensors will be in alignment and just as the door gets close to being shut it will vibrate enough to push one sensor off.
It goes partway down reverses direction and goes back up again.
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.
Measure the distance of the gap from the bottom of the.
Most garage door openers have an open and close limit control.
You push the button to close the garage door.
If the door stops short of closing lengthen the close limit by turning the control knob in the direction indicated usually counterclockwise.
My chamberlain garage door opener system 1 2 hp seems to be malfunctioning just recently when the door closes it reaches the floor and then goes all the way back up again after several attempt.
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 to be adjusted.
This brain can wear out in time so you could need a replacement.
A careless or rushed parking job can cause the car s bumper to block the sensor.
Your garage door sensor works by having two photo sensitive devices on either side of the garage door.
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 logic board needs replaced.
They are usually on the motor housing and you access them by opening a panel or removing the housing cover.
This is almost always the result of a dirty or obstructed safety feature.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.