Opener goes 12"+/- and then returns

Same exact situation. I think the chain has streched over the years and now has too much slack in it when it starts to push the door down. the chain buckles for a second and then reverses to full open position. Works properly 2 out of 3 times, however 1 out of the 3 times the door starts and returns to the full open position. Same exact situation. I think the chain has streched over the years and now has too much slack in it when it starts to push the door down. the chain buckles for a second and then reverses to full open position. Works properly 2 out of 3 times, however 1 out of the 3 times the door starts and returns to the full open position.

Sounds like the same problem here. It is just the trolley for me not the weight of the door causing the problem. I first had it where it was going all the way down and reversing and then coming up to the top and slamming to a stop. I adjusted it so it didn't have that problem at the top but it was still reversing. Then it was cycling down and popping up about 12".

Now it is just doing the 12" movement thing.

On the inside of the unit the travel distance is not being affected by the little sled like piece in the middle of the up and down travel screws - the little sled moves but nothing contacts the arms causing it to stop, so I am not sure what the problem is.

It is not the sensors and not the door though.
Sounds like the same problem here. It is just the trolley for me not the weight of the door causing the problem. I first had it where it was going all the way down and reversing and then coming up to the top and slamming to a stop. I adjusted it so it didn't have that problem at the top but it was still reversing. Then it was cycling down and popping up about 12".

Now it is just doing the 12" movement thing.

On the inside of the unit the travel distance is not being affected by the little sled like piece in the middle of the up and down travel screws - the little sled moves but nothing contacts the arms causing it to stop, so I am not sure what the problem is.

It is not the sensors and not the door though.

Same issue as above. I have tried adjusting down force. The up and down force was already set on "5" (which seems high compared to what I have seen on the internet). But I adjusted it up and down and it had no (noticeable) effect.
Same issue as above. I have tried adjusting down force. The up and down force was already set on "5" (which seems high compared to what I have seen on the internet). But I adjusted it up and down and it had no (noticeable) effect.

I have replaced the RPM sensor adjusted the up force and down force (Marty), checked the nylon bushings and gears and it still goes down about 8 inches, then up again 8 inches. I am not getting any flashing codes (5 or 10) that would lead me to believe that it is a safety sensor problem. Tiem to buy another? I have replaced the RPM sensor adjusted the up force and down force (Marty), checked the nylon bushings and gears and it still goes down about 8 inches, then up again 8 inches. I am not getting any flashing codes (5 or 10) that would lead me to believe that it is a safety sensor problem. Tiem to buy another?

I have the same problem.... I replaced all the worn gears and checked all the settings. As I try and close the door, it travels about 12" and stops and goes back up. I can't figure out what causes that. If the door is closed it opens perfectly fine. It only happens when the door is trying to close.



Bill I have the same problem.... I replaced all the worn gears and checked all the settings. As I try and close the door, it travels about 12" and stops and goes back up. I can't figure out what causes that. If the door is closed it opens perfectly fine. It only happens when the door is trying to close.

Bill

I HAVE THE EXACTLY SAME PROBLEM , I REMPLACE THE GEAR AND THEN ..................NOTHING RUN DOWN 2 OR 3 SECONDS AND THEN GO UP ................ I HAVE THE EXACTLY SAME PROBLEM , I REMPLACE THE GEAR AND THEN ..................NOTHING RUN DOWN 2 OR 3 SECONDS AND THEN GO UP ................