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What is the model number of the remote controls you are using? I think the Pro88 units had the old dip switch style receiver boards. Do you have more than one remote? Did they both stop working at the same time? Do they work on one unit but not the other?

Great, I'm glad you were able to fix it !!!!

Also check to see if the chain is slipping on the drive sprocket, or if one of the gears is not pinned to the shaft properly. Also look closely at the limit assembly to make sure its not stripped. See photo of assembly here.

Is the door balanced properly? If the opener is disconnected from the door you should be able to easily open and close the door by hand. If you put the door in the middle position it should stay there and not spring up or fall down. Check that first, if you still have problems what is the...

I would suggest changing the code or erasing the memory and re-programming

You can check the following: Make sure the close limit switch is adjusted properly so the door is shutting off as it contacts the floor,if its going to far the door might be re-opening. Make sure the photo eyes are aligned properly and not loose and nothing is flopping in their path. You can...