When baking pies the back pies burn when using thermofan setting. Back left pies burn when using conventional setting with fan. Have lowered the temp by the recommended 20 deg. What am I doing wrong?

Question edited for clarity and toss in a load of CAPS.

Disconnect the element and the fan and check them both for continuity with a multimeter. If the circular element or the fan fails, nothing works, so it could be either.

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You probably need service.

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yes it will

is it a fan oven if so sounds like fan not working or top element gone

If it is convection bake you have to turn the temp down (25 degrees or so) that is listed in the recipe.

The broil setting is not used to bake because it operates differently from the bake setting. So, don't go to the broil setting at all.
The element for bake is under the floor of the oven. You have not indicated whether it is gas or electric, but both of these can have issues with the burner or element.

If you are baking on the correct setting and the oven is heating from the bottom, not the top, this can be caused by hot spots that are created by elements/burners.

to check, look under the floor of the oven. Turn the bake heat up to high and see if the flame is uneven. For an electric oven, the color of the element should be evenly red, no brown spots.

If you are using an oven thermometer, move the thermometer to the spot in the oven that seems to be burning things the most.

When the food you're baking is done on top but not on the bottom--or when baking just takes far too long to finish--the bake element may be burned out.

You may get fooled into thinking it's working, because the oven is hot inside. But many electric ovens use the broil element, too, during the preheat and bake cycles. So the food may be getting heated only by the broil element, which causes poor baking results.

If the bake element is burned out, replacing it should solve the problem. Otherwise, you need to further troubleshoot the oven's electrical system to locate the defective wire or component.

Sounds like the temperature control is bad. If it's digital you'll probably have to replace the circuit board. if it's a control knob, it's the mechanism behind the knob.

Your forum doen't look like you can help.

f the oven doesn't heat and the on-off light works, test the appliance controls, motor,
and heating element .