The first thing to check is that the clock isn't in automatic setting first, if it is you will see a small 'A' flashing on the clock display. If it isn't that, you need to remove the cover on the appliance and check that the thermal cut out fuses aren't blown, they'll either look like inline thin wires with a transparent sheath or will look like a tablet with 2 male spade connectors coming out of the top. I hope this helps.
Simon Robinson. Datar18 at aol dot com, February 2010