I have been having problems with fleck 8500 twin valve over the past few months, during the start of the cycle the gears start making this clicking noise and do not advance the cycle. I have been able to push the gear to get it going again and then it starts clicking and won't go anywhere. I took apart all the small plastic gears behind the control panel and there were no stripped teeth, everything looked as it should. I thought maybe it might have been the motor going out which I replaced but it is still doing the same thing. I have had it on bypass for the last 6 months as I can't seem to get it fixed, this water softener has been nothing but trouble for me since I bought it 3 years ago and I am ready to trash it!! Please help.