Hello. I have a thermador dual fuel range. When I turn on the oven it will heat for a couple of minutes and then shut off. The preheating light will then blink 4 times and then the heating light will blink 3 times. If I shut the oven off and then turn it back on it will come back on a for a few minutes and then repeat above. It does not matter what setting I put it on (bake, broil, convection, etc) it does the same thing. Any help with this would be appreciated.