Check the Springs at the top of the door,,,, look closely to make sure one of them is not broken, if that is not the case check the door tracks to make sure nothing is blocking it.
the door moving and stopping sounds like the overload sensor is tripping thinking it has hit somthing.
Answers & Comments
Check the Springs at the top of the door,,,, look closely to make sure one of them is not broken, if that is not the case check the door tracks to make sure nothing is blocking it.
the door moving and stopping sounds like the overload sensor is tripping thinking it has hit somthing.