Product review (1 stars): Poorly designed, very noisy whistling fan, and no customer service...sorry we bought it.
We are still waiting for some satisfaction from Kitchenaid customer service on this item. The noise of the vent fan when using the regular or convection oven...is deafening. It has a low pitched whine that could drive you crazy. When we turned the oven on to cook for guests, who were sitting in the next room, they asked "what the heck is that noise?" The customer service rep told our service man that "that's just the way it is". We are very unhappy customers..which is a shame because the other Kitchenaid pieces in our purchase we love. The design of the range is also poorly thought out. You just need to brush across the front touch panel to turn a burner on, or initiate a function like broil, or bake...or turn the oven light on. The panel is waist high, so if you wear a belt buckle...you'll get this almost everytime to come near the stove, especially if you're reaching up to get at the microwave. Kitchenaid customer service has been non responsive to our concerns, and therefore we won't be buying the extended warranty. If they want our business in the future, I should think they'd move to satisfy us on this item.