Place a stepladder beneath the box portion of the garage door opener.
Garage door arm adjustment.
Adjust the springs on both sides of the door the same way.
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Settling is a problem for garage doors as it changes the way the door sits in the frame.
Once the spring is free of tension remove from its track hanger.
You may also have to adjust the position of the door bracket shown in the third image.
Once your garage door is secured remove the spring hook from the track hanger which will allow you to move the hook and adjust the spring s tension.
If you have a wooden garage door then you can trim the door down to make it fit properly.
Look for two limit adjustment screws.
If it was opening too quickly move it to the next lower hole.
This video details how to adjust the opener force and travel of the door.
If the door was closing too quickly move the spring to the next higher hole on the bracket.
Access door gap between floor and bottom of door safety must not exceed 14 reversing sensor.
You can do this with a jigsaw or a circular saw sanding off the bottom and replacing it in the frame so it sits properly.
These may be on the side of the box but are usually at.
You must attach the bracket that connects the arm to the door before you can attach the arm itself.
I left the door in the lift bay alone and just offset the opener completely outboard of the upper rail on one side.
To adjust your garage door s side mounted springs first open your door fully and secure it in place with a c clamp below the bottom roller.