Do not place baking trays on the floor of the oven
Before you start using your oven ensure any cooking trays and pans have been removed from the bottom of the oven space. Always place food on the shelves, never in trays on the bottom of the oven. The heat transmitted from trays and pans may cause damage to the enamel coating of the oven if they are placed directly on top of the surface of the oven bottom.
Always disconnect your appliance from the mains before you start examining it!