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.

eMail: steveb12313@gmail.com

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