求助帖：家里车库门老关不住，关了一半儿又回去了。

OrganicFarmer

求教！换了下面的激光sensor的电池，也水平矫正了好多次，还是换不上，总是关了三分之一后又回去了。大家有什么高招？多谢了

kingsnake

Adjust the up and down controls on the opener housing with your screwdriver. You'll see the adjustable knob on the back of the garage door opener.  Turn it a quarter of a turn either clockwise or counterclockwise to adjust for door height. If the door doesn't go all the way down, you need to turn the up/down knob counterclockwise. If it doesn't go all the way up, you need to turn it clockwise。

OrganicFarmer

蛇王真是知识渊博，多谢，敬佩！