Try adjusting the unlit sensor by manipulating it slightly with your hand.
How to adjust garage door opener sensitivity.
A flathead screwdriver is all that is needed to make a limit adjustment on most garage door openers.
Step 3 adjust the safety reverse.
If the opener is not picking up the door properly adjust the opening pressure until the door lifts smoothly.
Program your genie garage door opener to recognize when the door is completely closed.
If the door won t stay open to its full extent or doesn t close flush to the ground the travel control needs an adjustment.
If the up travel isn t functioning properly turn the up limit adjustment screw clockwise.
Check the sensors to see if they are dirty.
Press the close travel limit button again and hold it down until the bottom of the door is pressed firmly against the ground.
Adjust the dial or knob until pressing the opener causes it to stop raising the door as it becomes about even with the top of the garage door opening.
If the light comes back on the door should work properly again.
There are two screws one for the closing pressure and the other for the opening pressure.
Press and release the close travel limit button to move the chain or belt connector forward to engage the carriage assembly.
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.
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This video details how to adjust the opener force and travel of the door.
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There are force adjustment screws on the back of the garage door opener unit.
How to adjust craftsman garage door opener sensitivity.