I have a stanley garage door opener model # ST205.A09 When it opens it goes up too far and when it closes it comes down with alot of force. When this first started it went up about 2 feet then came down. I tried to reset the open and close settings but now I have the problem with it having too much travel or force going up and down. Thanks for your help

Stanley Garage Door Opener Manual

If the door is heaver than the original you may to adjust the opening force and the closing force. Check your instructions. The closest gdo I found was a chamberlain 8500. Go online to
Elite Series 8500 Garage Door Openers LiftMaster and see if this the same unit. The instructions can viewed . Good Luck

There should be two screw slots on the side/end of the lifter motor unit.
One is for how much force to close, the other how far down it comes.
Adjust the one for how far down it goes.

There are two sets of adjustments. Down position and down force, If the travel is set to far in the down position the max down force setting will trip and the door goes back up.


Adjust he down position until a slight gap is visible in the down position. Adjust slight steps until no gap is visible.

If return trips increase the down force slightly . Position adjustments are on the side, down force blue knobs on back. Note adjustment positions before beginning so if you get confused you can start over.

Hope this helps?

It sounds like you need to adjust your down limit switch and/or perhaps your motor force settings. If the limit switch is not in the sweet spot along the rail it can be triggering too soon or not in time. In your case it could be too far down the rail and thus not stopping/slowing the motor in time. Your door is then being pushed against the floor too hard. Your safety/return force is goes way over limit and tells the opener to go back. While closing your door look at your rail and if its bending when the door hits the ground, this is definitely happening. After finding the sweet spot for your down limit switch, you can readjust your return/safety force per your opener manual.

I have a feeling the down force adjustment is set much to high. If the door is hitting the floor hard enough to bend the rail the safety should be reversing the door to the open position. Maybe this will help.

The force adjustments control the pressure used to open and close the door. A new garage door opener from the factory is set to the lowest possible force adjustment. If you have a properly balanced door, the forces required to open and close the door should be minimal.

The force adjustments are usually located on the rear of the garage door opener and/or under one of the light lenses, If your opener has two lights. If you have lights on the side of your opener, the force adjustment will be located under the right light lens. The force adjustments are labeled with an arrow indicating open or close and numbered 1 to 9, with one being the lowest force and nine the highest. The force adjustments can only turn 260 degrees, or ¾ of a complete turn. Changes to the forces should be done in 10-degree increments. Please remember that too much force will interfere with the proper operation of the safety reversal system. Do not increase the force beyond the minimum required to close the door. Do not use the force adjustments to compensate for a sticking, binding, or unbalanced door.

It sounds like the door is traveling too far in the down direction. When it hits the floor the safety causes it to reverse to the open position. You need to adjust the 'down limit' not the force.

I understand the Whistler was mad by Stanley. If yours was made after 1998 the KLIK2U will work with it. Follow the steps under Type 4.

I had a simular issue, except mine was that the previous owner decided to mess with all the settings and mounts and screwed everything up.

The problem isn't your force sensors its your downwards stopping sensor on the opposite side of the opener. For me I had to take the entire panel off and replace the sensor back in its holder, but try adjusting that sensor setting (clockwise goes down, counterclockwise goes up).

If that doesn't work then i dunno:)

Also set both force settings in between 0-1, for some reason with mine if i set it higher it would set them off....

try adding a little more down force