You should find two plastic screw heads or knobs on the back side or bottom of the housing.
Craftsman garage door won t stay down.
If you re craftsman chamberlain etc garage door opener is closing and then opening up its likely a common problem related to the stop limit mechanism.
If you ve tried everything listed above and your garage door still won t go down you can try to force it to close.
It will cause the safety sensors to reset and may fix the problem.
Adjusting the limit travel setting.
Check the motor housing mounted to the ceiling of your garage.
Try resetting the sensors.
This is almost always the result of a dirty or obstructed safety feature.
Test after each adjustment.
Test the garage door to see if it stays closed.
The springs may be too loose exceeding the capacity of the opener.
This only works on certain electric models.
You push the button to close the garage door.
The craftsman garage door opener shown here has two set screws that control door travel.
The force adjustment screws are typically on the right side.
For intermittent issues with the sensors you may just want to do a hard reset of the system.
Adjust in small increments a half turn or less.
Continue adjusting until the door opens and closes satisfactorily.
On the switch pad located on the wall press and hold the pressure plate for a few seconds.
When you find the adjustment screws or buttons decrease the down limit a little and try to close your garage door again.
Adjusting the travel setting on a garage door opener.
To do so unplug your garage door opener and then plug it back in.
For craftsman models you decrease the down travel by turning the down limit screw clockwise most craftsman models.
Start by rotating the down limit screw or knob one complete turn in the minus direction.
It goes partway down reverses direction and goes back up again.
When your craftsman garage door opener is overheating or hums and doesn t move it s a sign that there is a problem with the garage door s mechanism or the motor is overheated.
This problem is confirmed with the diagnostic led flashing five times or with the error code 1 5 on newer devices which means the up arrow blinks once and the down arrow blinks five times.