Hello everyone. I just bought a house and my stove/ oven is an old model " Magic Chef model 24MN72KKW". Everything is ok except the ovens. I cannot turn on the oven. I try tu turn the thermostat but it wont. It does the same thing with upper oven thermostat. I asked the previews owners and they said that they never used it since they bought it. Any idea how to turn the ovens on? Is there any safety switch?