I have a 2010 QCA GT-289 hot tub. Pump 1 runs almost continually, and pump 2 does not turn on, though I can hear the relay click when I press the button for it. I’ve plugged pump 2 into pump 1’s spot and it does work. The 20 Amp fuse was blown and I replaced it, but it did not help the situation. Checked for voltage coming out of pump 2 port, doesn’t seem to make sense to me, I’ve got 115v at the red wire, and 115v at the white wire, no voltage on the black. What is going on? I also replaced the upper control panel (had one on-hand), no change in behavior.