Door goes down and when it stops at botton, it turns and goes back up ??? Need adjusting ..How can I adjust???

If the door is not reversing when it hits the up limiter, it could be due to a problem with the safety sensors. Check to make sure that the sensors are aligned and that there is nothing blocking their path. If the sensors are not the issue, you may need to adjust the up limit switch. This switch controls how far up the door goes before it stops. If it is set too high, the door may not reverse when it hits the up limiter. To adjust the up limit switch, locate the adjustment screws on the motor unit and turn them in small increments until the door stops at the proper position and reverses when it hits the up limiter.

OK, this sounds like a travel adjustment. Inside some units there are travel limit adjustments. Also, when was this installed?

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

hello sue... That activity must have thrown the door out of adjustment.. On the motor unit there are high limit and a low limit adjusting screws. The low limit screw needs to be adjusted to move the door down until it closes properly. Just adjust it 1/4 turn at a time and then test it to see where the door is at. Joe

Disconnect the opener from the door. Operate the opener. It should go back and forth smoothly.
Lift the door. It should go up and down without any problems.
After checking those things, there is a "up force" and "down force" adjustment on the opener, try increasing the "up force" by turning the adjustment in the direction of MORE force.

If the door is hitting the floor and then reversing it is traveling too far in the down direction. Locate the 'down limit' on the side of the motor unit and turn it in the opposite direction of the arrow printed on the cover. Some tweaking of this control will be necessary to get the travel just right. The force adjustment affects the safety of your opener. Try to put it back where it was.

Check your travel limit switches. There will be an adjustment for Down travel, as well as 1 for up travel. There is also an adjustment for Force or Sensitivity. Make note of the current positions before changing anything so that you can go back to original settings.

If you are sure that nothing is tripping the light beam(s) / safety sensors, slightly increase the FORCE / Sensitivity adjustment in small increments. Look at the lablel of the adjustment to see which way to turn it, or consult user manual. Small increments at a time, until the door starts to work properly.

If you can't seem to get the sensitivity set, then reset it back to the position it was, and decrease the down travel in small increments until the door goes down, and stays down.

Once the door is staying down, increase the up travel adjustment in small increments until the door stops where it should.

Run the garage door opener through a few cycles for a few minutes. Make note of where the adjustment settings are.

If your door is metal, then you are done. But if your door is wood, you will likely need to adjust the force / sensitivity adjustment when the door is dry (low humidity time of year) as well as when it is wet (rainy season). Usually the best time to adjust the force is when you are in the time of year of when it is most humid. That is when the most stress / friction is on the door hardware.

It takes a little while to get everything perfect, but it is usually hands off afterwards until changes are made to the door.

It would be a great idea to go through and do the maintenance (grease rails, lube rollers, etc) before trying to adjust the opener. It will not only prolong the life of the door and opener, but the adjustments that you make will be valid for a longer time.

YOU NEED TO ADJUST THE DOWN FORCE.

YOU WANT TO TURN IT COUNTER CLOCKWISE TO THE STOP (THIS ADJUSTMENT IS ONLY ABOUT 3/4 TURN FROM MIN. TO MAX.). THEN TRY THE DOOR IF IT REVERSES TURN IT ABOUT 1/16TH TURN CLOCKWISE. CONTINUE THIS VERY MINOR INCRAMENT ADJUSTMENT UNTIL THE DOOR CLOSES WITHOUT REVERSING. THEN GO 1/16TH TURN FURTHER.

YOU SHOULD BE ABLE TO STOP THE DOOR AND REVERSE IT BY GRABBING THE BOTTOM OF THE DOOR AS IT GOES DOWN AND LIFTING SLIGHTLY. IF YOU CAN'T GET THE DOOR TO BOTH CLOSE AND REVERSE WITH MODERATE PRESSURE YOU MAY NEED ADJUSTMENT TO THE DOOR / SPRING / ETC.
- I DO NOT RECOMMEND ADJUSTING THE DOOR YOURSELF - CALL IN A PRO FOR THAT.

IF THE ADJUSTMENT IS SUCCESFUL ADJUST THE OPEN SENSITIVITY / FORCE IN THE SAME MANNER.

HOPE THIS HELPS

Check the down limit:
If the light bulb(s) on your operator are on the front and/or back, the limit adjustment screw is on the left side of the operator (looking from the back of the operator and facing the garage door).. If the lights are on the sides of the operator then the limit adjustment screw is on the left side (looking from the back of the operator and facing the garage door).

Check the up and down force: 
On your operator (the box that hangs from the ceiling). If the light bulb(s) on your operator are on the front and/or back, the force adjustment screw is on the back of the operator. If the lights are on the sides of the operator then the force adjustment screw is on the right side (looking from the back of the operator and facing the garage door). Turn the light blue adjustment screw with the up arrow to a higher number.

Check to make sure that the garage door is balanced. Sounds like the springs need to be adjusted and the travel limits need to be reset.