I just put a new Jandy 1400 on my pool. I found out (not through Jandy) that the Flow senser line came with a little circuit board that I plugged right into the main board. All kinds of problems from a no flow to error codes 173/183/184. After talking with my Agean pool guy he said take the little circuit board off and attched the line directly to the main board. And now everything is working great. Check to see if you have that little board, it's not an inch wide by 2in long.