My garage door seems to want to travel too far up and down. The travel adjustment screws don't seem to do anything (almost like they're at the end of their adjustment range). Door height and all is typical. Is there a part that could be bad that's not calculating the travel properly?

This can be one of two problems ! First problem can be that their is something blocking the infrared sensors that would cause the door to go back to the up position but in most cases if their is something blocking one of the sensors the door should not even move and just make a click sound and you will see the lights flashing on the garage door opener , it can also be a mis aligned sensor not pointing directly at the recieving sensor or vice versa! Ok if that was,nt the issue then you can make shure that the door isn,t traveling further then where it needs to stop to be closed, sometimes the chain or belt depending on your opener loosens up and can add an extra inch of travel to the door causing it to return to the up position, to fix this you have 2 adjustments on your opener ...1 will be a pressure adjustment ...you can turn the adjustment to midway #6 to add some pressure so that the opener does not sense the xtra travel of the door , You can also backoff on the downtravel adjustment a turn or two and that will make the door not come down as far ...This adjustment is used to set how far the door goes up and how far you want the door to come down, you will see a picture of the door on both of these adjustments with an arrow letting you know which way to turn the screw ..remember each full turn of the screw equals 1/4" inch of travel to the door just follow the direction of the arrow or turn the screw counter clockwise for less travel !,,,Hope this helps you Sincerely Glenn

Open the garage door fully by pressing the wall control button. The bottom section of the door should be right at the header in the "full open" position. If it is too far back, the door cable can become misaligned. If it is not back far enough, you may not be able to get your vehicle in and out of the garage.

2

Position a stepladder behind the garage door opener motor. Locate the limit adjusting screws on the left side of the motor housing. Have a friend stand by the wall control button.

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3

Insert a screwdriver into the slot for the "up limit" adjustment screw. Turn it to the right to decrease the door travel and turn it to the left to increase it. Turn the screw in small increments.

4

Close the garage door by having your helper push the wall control button. Notice the seal between the door and the floor--there should not be any light coming through. Adjust the "down limit" screw in the same way if necessary.

5

Operate the door by the pressing the wall button and check your adjustments.

Read more: How to Adjust a Craftsman Garage Door Opener ' eHow.com http://www.ehow.com/how_5419011_adjust-craftsman-garage-door-opener.html#ixzz2Hm1tx0a0

It sounds like your door is traveling just a bit too far in the down direction. Locate the 'down limit' adjustment on the side of your motor unit and turn this control a bit in the opposite direction of the arrow printed on the cover. Some tweaking will then be necessary to get it just right.

Try to re-program travel and force limits. Make sure that travel limit (down) does not go too far (thus excessive force). Apparently this system has a force sensor that senses if there is something in the way of the door. This is different from the safety sensor "eyes". The problem in your setup is that you have programmed the door to travel down too much and he system looses its ability to use force sensor. Adjust travel limit (down) to a little less travel and you will be fine.

Are you turning travel screw, or force screw? If travel, One is for how far up and other is for how far down. Insert screwdriver into UP adjustement and turn it opposite direction of arrow. Try 2-3 turns to start. Yu may have to turn back CW. If while adjusting door just stops, go have a cup of coffee. You overheated motor. Give it 15 minutes to cool down.

You might want to check that the sensors mounted on the side of your garage are lined up .... Also you can check the garage opener itself, there is a screw usually in the back with a +/- .. by turning this screw you adjust where the garage door stops if it is set too far on the + side it might be opening because of this

If you are at the back of the operator looking toward the door the limit adjustment should be on the left hand side.
The adjustment closest to the door is the down limit turn that 3 turns clockwise. The adjustment screw furthest from the door is the up limit turn this screw 3 turns counterclockwise. That should get you close to factor settings. If this does not work; remove the cover on the operator sometimes the limit assy. come apart.

Use a flat blade screw driver to adjust these limits by inserting it in the holes as labeled . Start gradually adjusting and stopping the travel if needed by pushing the open/close control as per usual.

Open up the caseand look at the travel assy. Sometimes the limit (up or down) do fall off the assy. Just snap it back on.

your door travel screw is set to go too far on the downward travel. you need to set the down travel. It is set to go too far down. find the screw adjustment on the unit that says close and back off the screw a full turn until door stops short of floor. then start turning screw other way until door just touvhes floor.