I have a new Whirlpool electronic built in oven. It is extremely loud. I have had the fan replaced,but the noise is so loud that the only way to stay in the kitchen while baking is to wear noise cancelling head phones. The tech said this is normal. Is It? This in not a convection oven. Am I the only one with this loud annoying oven. I understand about the fan cooling the electronics, but it (the fan is running all the time).