[Shop-talk] Garage door opener issue

[Moose]

I have a 23 year old Raynor Powerhoist commercial unit. (it's for a 14' X 
14' door.)

Just out of nowhere, it started going up a foot and closing.  Over and 
over again. 
I have all the remotes, and nothing changed. 
I also disconnected the door and the unit still does this so it isn't a 
door/spring/resistance issue.
I live in the middle of nowhere, so there isn't any interference possible.
There are no unusable noises. Unit is working fine opening and closing 
even with the door connected. No other noise or issues. 
I haven't touched this unit, the door or the track in a long time. 

Anyone got any ideas?

Thanks in advance

Moose
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