My DCS WOT-130 electric oven, once it reaches the set temperature will not sense a drop in temperature, even after I open the door for awhile. Only if I press "Bake" again, after a few seconds the readout will display the drop in temp and the oven will start heating up again. I even tried to cool down the temperature sensor with a cold sponge and the same happens. Does this sound like a control board problem? Thank you