I have a Thermador SMW272B (Microwave, warming drawer and convection oven) and the oven has stopped heating. The control panel appears normal but when it enters preheat (in Bake, Broil or Convection) the elements never get power and heat up. I have checked the continuity of the Bake element and it shows 22 ohms. I do not know where other potential problem elements are located (like the thermostat, relays, etc.) and what is most likely the issue. I started to pull the unit out but the power cord is too short to get it on the floor. If I have to access components from the rear of the unit I will have to disconnect the power to get it out on the floor. I am looking for two things. What are the most likely causes of the symptom and how do I get to those components and what test can I do to narrow it down. Thanks!