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.
Garage door opener stops and starts.
Set a safety ladder under the garage door opener.
The 3rd cause is a malfunctioning travel limit switch.
Open up the case and look for a screw type track that moves when the opener runs.
The lights on the main unit do not flash when the door travel is stops unlike when the safety sensors detect something.
The travel limit switch mounting setscrew can vibrate loose allowing it to move or fall off.
Locate the limit switch adjustment either on the back of the opener or behind the light bulb s lens cover.
Additionally a simple rebooting can help.
The problem occurs with all of the controllers wired opener wireless keypad 2 remote controllers.
If your garage door opens and suddenly stops it might be because of your logic board.
The safety sensors are properly aligned and the show the correct amber green lights.
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.
As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
You might need to consider replacing it if your door is not working properly or you may purchase a new opener.
This fails to tell the door it is time to stop and the opener tries to drive the door into the ground again exceeding what the door believes to be allowable tension.
Sometimes the limit switch is activated by the movement of a specially shaped nut traveling on this track.
Some models have two screws labeled.
Finally it s possible the garage door opener s motor.
The logic board receives and responds signals to any remote.
It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned.