Which model D1 do you have? I looked at the D1 site and it seems that they have a 3 year warranty on "pumps, control system and heater." I would THINK that would include the control panel...
I had an underwater magnetic switch go out on my D1 Sarena Bay and they promptly replaced it -- and better, showed me how to deal with it if it gives me trouble. Not a big deal at all...
Have you talked to your dealer again? The D1 warranty is pretty good on most things...
Let us know what happens!
Larry Becker