yes sounds like the elements may have burnt out if you isolate power of the oven unscrew the four screws at the back of the fan oven you will see the element unscrew the cental fixing the element will pull out to reveal the spade connectors pull out and test with an ohmeter between the to pins you should get a resistance reading if it is open circuit you need to replace it the elements I have found so far are about £50
As for the top oven I am unsure how that works yet and am trying to find information on why it seems to take so long to heat up hope this helps
Craig Morris, August 2009
