After running a clean cycle for about 1 1/2 hours my oven will not heat.

The first thing we need to do is establish if the board is bad. So, kill the power to the oven, and pull the oven out, and take the back panel off. Now in the middle of the back side there is a thermostat. It is round, about the size of a quarter, and it is held in by 2 screws, and has 2 wires coming to it. What I want you to do is take the 2 wires off of the thermostat, and join the 2 terminal ends of the wires, and put some tape around it to keep them together and to cover the terminal ends so they don't hit metal, and then turn the power on, and see if it works. If you have a meter, and want to check the thermostat that way, pull one wire off, and see if you get an ohm reading. If not replace it, and the oven sensor. What happens is the oven gets to hot in the clean cycle, and blows the thermostat in the rear. So if you replace the thermostat only, when you clean it again, the same will happen. That is why you have to replace the sensor. If none of that works, replace the control board. Tom Appliance Educator, Appliance Parts, Washer and Dryer Parts, Refridgerator and Freezer Parts, Stove and Oven Parts