Oven is 20 years old. Model number as already stated. The is an analogue timer clock but we rarely use it. There is nowhere for any error messages to appear. The oven light comes on and so does the cooling fan but not the heating element or the circulation fan.
Fixed now. Called in my local repair man - cost me £40 including new T-stat. Becuase the fan had stopped the element overheated and had burned out the temperature stat. There was nothing wrong with the controls. Also the replacement fan, supplied by eSpares, was a different make and design and was supplied without screws. The original screws were too long and hit the back of the motor housing causing it to screech.
Not sure about the advice. New hotpoint switches cost over £40 and eSpares don't stock switches for the 48254 model.