Lavamat 86730 pump stays on, code C3 when dial on any program?

Our Lavamat 86730 stopped with a C2 code. After I cleaned the filter on the front (1 toothpick, 1 hairclip and a lot of hairs and some strange plasticky goo) the machine spontaneously started pumping (even thought the dial was set to OFF)

When you put it on any program, it gives a C3 error, and the top 2 LEDs are flashing.

I suspect the C3 is because we couldn't completely drain it (it is sitting in a special spill tray), and the machine got wet feet... But resetting it (all 4 left buttons and 1 click counter-clockwise) doesn't seem to do anything, and the pump keeps running until we unplug the machine...

Ehhh... Help?...