I have an above the stove model microwave, Model # smh9151b. It was continuing to run when the door was open and it sounds a little "rough", like a slight "grinding or rumbling" (whether the door is open or closed.) I unplugged it, pushed multiple buttons, opened and closed it a number of times and eventually, it shut off when opened. I wondered if it emitted microwaves when running with the door opened or just the fan. Also wondering about the "rough" sound.