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I have a 20 year-old Aqua Logic PS-4 with Hayward salt chlorinator, Pentair Max-E-Therm NG heater, pool with spillover spa, separate pool and spa lights. Recently had display issues and HLS error on the heater so replaced display board, keypad, thermister, high limit switch, thermal regulator...

I went and bought another flow switch yesterday on the off chance that the first one I replaced was defective. Sure enough everything started working fine. I put it into super chlorinate mode last night and all was good. Went and checked on it this morning and NO FLOW again and chlorinator...

Thanks James. Really appreciate the help - even if the end result sucks.

Thanks. Just tried it. Turned system off and back on. Waited for the chlorinator delay countdown and then...NO FLOW. Same result. Does this mean definite board issue?

I'm trying to determine if i need to purchase a new main board GLX-PCB-PRO for my Hayward Pro Logic Automation system. All functions seem to operate correctly except I have a constant no flow message and an inability to do any of the salt functions. I’ve replaced the flow switch but that did...