Problem: Won't heat - all other elements work. Problem caused by using microwave without anything in the oven. Tried to use as timer but failed to cut on timer mode . After a few minutes fan cut on. After that no heat.
My guess is magnetron but would like to see if there may be a fuse. All lights and turntable motor works ok. My warranty says that there is a 5 year against manufacturer workmanship or materials. I don't think I fall into that catagory.