Can you please help diagnose the following problem and suggest solution please

I have a SMEG SUK61MFX Oven (Gas hob electric oven)

The oven is not heating up when the knob is turned to ventilated heating element and ventilation position - the fan is working

The lower oven is heating up with the knob turned to lower heating elemment and ventilation - the fan is working
The oven is heating up with knob turned to upper and lower heating element without the fan

BelB, August 2011

there is another element in the back where the fan is that you can see working.replace that and all should work again

ck, August 2011