Tighten the adjuster three full turns clockwise to add tension if the door closed and did not remain open halfway.
Tighten garage door belt.
In most cases all you have to do is adjust the opener belt of the belt drive tightening it to ensure smooth running.
Loosen the adjuster three turns counterclockwise if the door raised without.
All you need to get started is a step ladder a 7 16 inch wrench and a flat head screwdriver.
1 close the garage door.
This is a very simple job to do yourself in fact all you need to do is follow this simple 6 step guide.
The only thing you need to do with a belt driven opener is to adjust the belt occasionally.
But basically assuming the belt is attached with enough slack removed the tensioner bolt should be able to taske up the rest of the slack once tightened.
Brand new chamberlain garage door opener with excessive slack in belt drive.
Step 1 closing the garage door before beginning use the garage door opener to close the door and fasten it.