I found that the resistor had a bad wire so I reattached it worked good for one day. Lift is in frozen environment 90% of the time and gets stuck when forks are on second mast and wont go up or down. When it thaws out though it will work for a couple hours. Error code 817 is not in my manual it skips from 816 to 818 so I dont even know what it means. I am thinking it is the encoder that needs to be replaced but I dont like just throwing money at something and hoping it will work.