Was at this machine today shows E30 fault code, i suspect it is pressure sw related but not sure i have checked for blockages, wiring etc when the door is shut E30 pops up and door lock cylces on and off, i would be gratefull for any help cheers jj.
Try easiest way first: check heater for earth leakage (measure between each heater connector on both polarity)… and you will be surprised 😯 😆 😉
or change pressure switches