Just needing some experienced advice. A couple days ago when the oven was igniting through out the bake cycle... The sound was not normal. It is a roar similar to that of a jet engine. Yesterday we turned it on and after the pre warm cycle it had not heated up. We tried it again and it kicked on but had the roar each time it kicked on. Trying to find out if this could be the ignitor or the sensor. It all looks clean and intact. Thanks so much for your time!