GE self-cleaning oven has odd temps
I have a smooth top ge self-cleaning oven. Two weeks ago out of the blue it began to brown baked goods too quickly with the middle not baked through. Rolls brown unevenly (too brown on the bottom and doughy inside/on top/middle). Its as if its decided to be a microwave. I purchased an oven thermometer to check the temp. It preheats to within a few degrees shy of where it is set but within several minutes it reads about 5-7o higher than the set temp. I pulled the knob off the try to adjust the temp but there is no place to do this under the knob. When you pull the knob off it says "don not remove". It is as if there could be a spike in the temp when it is cycling on and off. This is very frustrating as I like to bake a lot. Could this be a thermostat or probe problem? Thanks.