Unplug the appliance and take the top and rear cover off.
Be careful as the exposed edges of the metalwork are razor sharp.
Check the wiring, the thermostats and the element.
If the wiring is burned, repair it.
If the thermostats or element are open circuit, you'll need to replace them.
Have a look and see what you find.
Hope this is of some help
Let me know how it goes or if you need more help
Many thanks I found two spade connections with the wires burnt, cleaned connections
and fitted new spades Success
Thanks for coming back and letting me know how it went.
Thank you for the payment , it is appreciated.
Good luck with the appliance.