I think its actually
Please go here (Just click on the word in blue)
This is the heating element.
Turn off the power, remove back panel, down low on the backplate is the oval fixing plate with the central nut. (Look at the 3rd picture in the link I sent you, this is what you will see).
Ideally, if you have a meter, test the element first, but from your description this is the issue
If you need more help, pleas just ask. In the meantime,
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