The door which is supposed to open only when the fan is turned on, constantly opens and closes when the fan isn't being used. When the fan is turned on, the door opens and stays open as it should. As the door continues to open and close, there is a "clicking" noise which seems to be coming from the right side of the oven, behind the menu panel. I have disconnected the switch and motor which turns the mechanism which opens and closes the door and the "clicking" sound is still present. Everything else appears to function as it should. Any ideas? Thanks.