Intergrated single over (Burton on Trent DE15)

I have an integrated single over than has been used twice, but it trips out the mains every so often.
Cooked Xmas dinner with only one trip. I have replaced it now not sure how much would take to fix but might be worth it to someone.
The oven is a Zanussi
Model number is 94949702102
(ZOHNA7K1, ZOHNA7X1)

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