Sorry, but I'm puzzled. You say you gave my suggested set up a try and then started to talk about AUX 4??? Did my set up not work for you?
I used a Feature circuit, not an AUX circuit. The advantage of using a Feature circuit is that you are not using a relay that you might want to use elsewhere. And.. technically, you do not have an AUX4. You have the Pump/Filter#1 and AUX1, AUX2, and AUX3. That said, you can use AUX4 thru AUX 7, the same way you use Feature Circuits, although they have no relays, the button will still work to turn the circuit on and off, although the light above the button will not come on.
You can try to replace "Feature 6" with "Aux4" in my example above and give it a shot if you want, but to be honest, I do not have the time tonight to ensure that will work.
I don't mind looking at this again, but I need to know if my example did not work, or if you did not understand it. Tell me what happened when you tried to program it.
Thanks,
Jim R.