Replace a bottom heating element can't seem to get back of oven off allen keys don't fit do I need special tool?

Because in Main Oven Cavity (large) around the convection fan is very powerful ring heating element 2500W (not visible) who works in the Fan mode. Therefore, it is not necessary that all heaters work because it will overheat the oven.

Dado

its a tamper proof screw at torx 20 size.dont undo with a phillips tool will ruin the heads and never get them out.

Most likely it is a faulty oven heating element.

You will need to replace the element.

Usually the element is a circular shape which is situated near the fan, normally you will need to remove the back of the oven, Switch off the power at the wall first, locate the element and remove the fixing screws and electrical connections then fit the new element and reconnect.

Only attempt this replacement if you are confident to do so and have a basic electrical and mechanical knowledge.

You need to replace the oven element, located behind a removeable panel at the rear of the oven compartment.

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Sounds as if your oven heating element has failed. You need to fit a new one.

Usually you have to get the back off, disconnect the old element, remove the fixxing screws and element, fit new one, reconnect and it should be fixed. Don't forget to switch the power off before starting work.

If it is a fan assisted electric oven and the fan is working o/k, and the temp indicator lamp is lit, then you need to replace the oven element, located at rear of oven compartment behind removeable cover.
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This tutorial will show you how to check your Zanussi element and how to replace your Zanussi cooker element.
Here are the 3 main faults to look for in your oven or cooker that is not heating

1. Your oven will not work until the clock/timer has been re-set after replacing an oven element or tripping the electrical supply. Consult your Zanussi manual.
2. If you're Oven is not getting hot or heating up it could be a faulty element, if the fan in the oven is running and the thermostat light is on, this will lead us to believe that the element has gone faulty. With grills the thermostat light should come on there should be heat, if not then this could be the grill element or the thermostat.
3. When you turn the oven on, the household electrical supply trips on the Rcd (this is the earth trip in the fuse board sometimes called the breaker tripping) your fan oven element has gone to earth and needs replacing.

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It is the oven element that has failed
Remove panel at rear of oven compartment, there you will see the element, just undo any screws that you can see and pull the element towards you, carefully detach the wires, but don't loose them inside or you will have remove the oven to get the wires back on.
Fit new element and Bob's your uncle ,you've cracked it.
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