When your garage door opener isn't working properly, there are several components you can adjust to address the issue: the limit, the force, and the safety reverse.
Step 1 -Adjust the Limit
Turn the adjustment screw on the limit clockwise if the door doesn't fully close. To open the door completely, adjust garage door opener by turning the limit counterclockwise.
Step 2 - Adjust the Force
If your door doesn't rise at least five feet when it is suppose to be opening, hold the bottom of the garage door while it is lowering. This will adjust the open force. For a door that doesn't reverse while closing, hold the door as it opens to adjust the down force.
Step 3 - Adjust the Safety Reverse
Use a piece of wood to stop and reverse the door, if the door doesn't reverse increase the down limit with a clockwise, one quarter turn.