In follow up to my flow switch problem... the new one came in the mail this week... quick removal of old and installation of new.. and its works perfectly... I think the problem was with the cord which runs from the flow switch to the electronic unit... we were stupid and left it out over winter and it got wet froze, etc... even the directions say to remove both the cell and the flow switch during winterization... we only removed the cell. Aquarite was wonderful on the phone.. it was actually still under warranty, so we paid a pro rata amount for new flow switch. Interestly enough.. the new flow switch has a different type of wire now, than the flat phone type wire on the previous flow switch.