Measured almost everything: R1:18.2 Ohm, R2:18.5Ohm, thermal fuses ok, relays all working (main 230V and pcb mounts 12V), heating level switch (NO) OK, overflow switch (NC) OK, temp sensor OK (~48 Ohms).
Thinking trying to trigger the PCB CHN 410-600 triacs with an arduino and see how it...