While cutting beans tonite I got a little dirt in my 25' 1020 head, so I shut the feeder house and rotor off before I got out to clean the dirt off the sickle. After cleaning it, I got back in the seat, engaged the rotor and feeder house. When I tried lower the head back down to my cutting height, it dropped really fast and when I raised the header it did it really fast and seemed to lift somewhat even after I let off the button. It did this to me two more times and then it just raised and lowered very slow. The code on the corner post reads, header E1. I looked at the pots on each side of the feeder house and they look normal. I've never had this happen before, so I'm kind of lost, but everything else seems to be working normally.