I have been having problems with the thing for over a year and a half. I can not get it to regenerate. I have replaced the power supply, motor, rotor and disc, all gaskets and seals, by-pass valves, turbine support and shaft, turbine, and the switch. The only thing that I can think it could be is the control board. Is there any way to test the board? Every thing starts to work if you plug it in, and it will show 503 min. on the display and never change until it gives an err 1 message. What do you think? Can the boards be repaired?