ISE2 heater or heat sensor error code...

Hi all!

I have here an ISE2 washing machine. It gives an error code as soon as I turn it on.

Start pause and program end  both flash. This indicates a heater or heat sensor error. The heater reads a resistance of 29 ohms. The sensor reads a resistance of 15Kohms (I temporarily replaced it with another sensor that I had laying around which reads 6 Kohms at room temperature just to see if there was any change in behaviour at all. Which there wasn’t) None of the wires read any resistance to ground and I measured also with an impedance meter. When switched on, all it does is give off the error code and I can hear clicking. It sounds like relays clicking on the PCB right behind the controls. Quite fast/erratic/random. It can stop for 5 or 10 seconds and will then randomly click again.

Does anyone have an idea what to do/try next?