The mechanism stops part-way down and the lights blink, as if something is stopping the door's progress. The guide slides freely when released. Also, the mechanism goes too far up, ramming into the plastic housing of the opener.
There are buttons on the back labled to set the up and down movement and stops (apparently), but they don't do anything when pressed, either in a stop position or during operation. There are dials to set sensitivity -- those have not been changed. The opener was operating fine until one morning after a storm.
I've searched in vain for documentation for the door opener on the Internet.
I'm stumped as to how to reset the opener stops. Any guidance is greatly appreciated.
Thank is advance.