On 2009-12-07 18:03:24 -0700, said:

On Mon, 7 Dec 2009 06:56:59 -0700, Ben Jammin wrote:

I recently replaced the springs on my garage door.

Now I need to adjust the closing force on my Genie GXL9900-2 1/2 hp
Screw Drive Garage Door Opener. Although the door opens and closes
freely and clearly by hand, it closes nearly all the way but then
reverses and goes back up when using "Genie". Yes, the safety light
beam is clear and properly adjusted.

On the GXL9900-2 you apparently adjust the opening and closing force by
turning either a nylon nut with a wrench or a metal screw rod with a
screwdriver slot on the back of the unit, unlike the electronic opening
and closing adjusters inside the white plastic "light lens" on newer
units.

...

Those adjustments are the up / down LIMIT switches, The force limits
are small potentiometers (like volume controls) on the controller
board..

Use a remote when you are on the ladder

My understanding is that the limit switches are on the track itself --
not the body of the unit -- and that the GXL9900 has NO electronic
adjustments, only the mechanical clutch adjustment on the back of the
unit.

Of course, using the remote is a good tip: I should have thought of
that the first time I tried to make the adjustments.

Thanks,

--ben