I have a Autotrol Model 1550 7C I'm having a problem with the brine cycle. It just don't draw. I've found air leaks, and repaired them, so there are no air bubbles in the line. And I've just replaced the valves. That didn't help either, so what else is there I can do? What I did today, I recharged it(during the day) so I could see what was going on. I put the required amount of brine in a pail, took the line off the brine tank and stuck it in the pail, and sure enough it just wouldn't draw the full amount. Sure it did a little, but not enough for the complete cycle. Any suggestions, or do I get a new one?