Hi My Jenn Air trash compactor goes all the way down and then starts sounding like it is still open. It makes banging noise. But if I turn the rotary knob back right after I start, it will work fine and return without any noise. I just have to make sure that I turn the start rotary switch to off position.whereas before the switch would do that automatically. I need to know which of the following switches I have to replace? A) Directional top switch or B) Rotrary start-run switch