Finally I removed the 2 screws (M2 x 1mm Phillips Head Screw) holding down the power cord. Cut off all wires.

This is the Rotary Switch that connects the dial and heating device. It has a bare shift actuator and I couldn't get it open but most likely houses the PCB.

The red and green Led diffuser caps go top of the small Led bulb and next to the signs indicating 'empty' and 'on'