Hello , we’ve had some issues with a Neff double oven , in that first reported fault was bottom oven not heating , turned out to be a o/c fan oven ring . This resolved the problem for a day or so , then the high temp limiter blew as the machine wasn’t stopping heating , this was replaced as well as the PTC , this again worked on test but customer rang a day or so later to say her kitchen was full of smoke (slight exaggeration)and that the oven was glowing red hot !!! Now it heats to requested temp i.e. 180 c then stops heating and cools to about 80-90 c . where it stays . Any suggestions , maybe electronic control brd. ?????
Any help gratefully received .
Best regards , Phil .