You should always leave 2 to 4 inches around the circumference of the freezer. Some of them are even designed to get into action if they sense any kind of breech in security. They are equipped with a wide angled night-vision-camera that can take control of the house even in darker states and take pictures when the lights are dim. To locate the parts you need, search in the Yellow Pages, try visiting a parts service store online, or just get in touch with the manufacturer.