The belt needs to be connected with the tensioner loosened so that the tensioner can be used to take up any excess slack.
Tighten garage door belt.
The manual does not indicate how to solve this problem.
The specific procedure should be in the manual for your unit.
Loosen the adjuster three turns counterclockwise if the door raised without.
Step 1 closing the garage door before beginning use the garage door opener to close the door and fasten it.
In most cases all you have to do is adjust the opener belt of the belt drive tightening it to ensure smooth running.
All you need to get started is a step ladder a 7 16 inch wrench and a flat head screwdriver.
Brand new chamberlain garage door opener with excessive slack in belt drive.
This is a very simple job to do yourself in fact all you need to do is follow this simple 6 step guide.
1 close the garage door.