I asked about this a few months back I guess. One of my valve actuators randomly decides not to move it’s the one one that picks to pull from the pool or spa and caused my spa to drain. It switched fine to the spa but didn’t switch back. I played with the switch on the bottom and it didn’t move. Then I moved it manually and it started working again when I was cycling through the valve settings on the pda panel. Main question is how do I know if it’s the pda or the valve before I start buying parts to rebuild the valve?