I have a MAC door operator running off an EECO controller giving me some fits. I got on site and found the door board faulted out with the red LED7 lit. The doors were about 5 inches from full open. When I flipped the door board switch to test then back to run the doors immediately go full open and work fine until I give them a little resistance while opening. It appears that the smallest amount of resistance while the doors are opening will stall them out. I've replaced the door board, checked the door motor brushes, the door motor commutator looks brand new and no carbon build up. Not quite sure what to look at next. Any tips would be greatly appreciated.
