Gotta change the thermostat in my in-laws Jenn-Air D120 oven. Can anyone tell me how to get to it? Haven't been able to find a manual online for ref. Guessing the control panel will come out somehow. Any help appreciated. I will have the part sometime next week, just getting prepared so I know what I'm getting myself into and have the right tools. They live 2 hours from me so I need to be prepared.