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My ESP-6TM A/B switch has a program issue. On manual, A valves work fine / B valves work fine. On program, A valves work fine; B valves do not activate.
Tks for any response.
Why won’t the A/B switch work properly? I can program A and it works fine - manual or program; same with the B switch. However, when programmed to have B stations run after A stations, B station valves will not function