Why would they need an appliance engineer? It's a 10 minute job - remove rear panel and swap out the stats!
Brian, February 2008
2 sensors behind the rear cover about the size of 20p piece cost £13 to replace part number 1701583 one of them will have a grenn dot on the reverse. Simply remove old replace with new. Regards.
hugh, January 2007
more than likely thermal cutouts have open circuited,,suggest you get qualified appliance engineer, as it is a bit more than a diy job.