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There are a lot of brand new weak batteries out there. How can I tell if it is the battery causing the door to not open or only partially open.
Please check out this video about WEAK BATTERY.
An Obstruction and a motor going bad show similar results. The electronics can't tell the difference; it measures motor current and if it is too high then it is either extra load due to warping, sliding, rubbing, or friction, or the motor itself is getting weak. The response to this we call "RETRY" where the motor reverses directions only a couple inches and then tries to go again
TBD. Video coming to clarify the ADOR response to Obstruction or Weak Motor..