We have had a similar issue (FE31) and it is a known fault with components that are on the circuit boards.
I have always had prompt service, technicians arriving within days (and you can track their vehicle on its way to your house) good communication and the technicians have always been super understanding / professional.
Of course I want a perfect product 'day one' so whilst it has been frustrating, the after care support has been very very good.
The reality is the cook top is fantastic, so even if I was offered a refund I would prefer it...Read more

We purchased a KM 6322 cook top with our new house.
Within weeks of moving in:
1) FE 31 error message pops up and 1x hot plate is dead; 2) Call Miele Service Department and then wait 7 days for a technician to visit; 3) Couple of days later the FE 31 error message disappears; 4) Cancel technician; 5) FE 31 message reappears, 1x hot plate dead. 6) Back to Step 1 and repeat 3 times! GRIPE A - Miele Service is very poor for a premium product - you shouldn't have to wait seven days for a tech to visit. 7) We wait for a technician to arrive and...Read more