they wont pay as it is not effecting the oven ie electrical/mechanical breakdown.
i had a call for d&g on a fridge freezer which wants a new door as the lining had broken were the shelves attach told by them that they will not auth any repair as the door is a non functional part ie not covered as it is not mechanical or electrical its a cosmetic part.
the same i fear the same that they will tell you but give it a go as all insurance are quite happy to take your money and not payout for any silly reason.