Gas oven will not maintain oven temp. Oven will not light after setting desired bake temp, until one of the top burners is cycled on. Temp on control panel does not display the actual oven temp after the initial bake temp has been achived. example set the bake temp for 350. Oven will not begin to heat up until one of the cook top burners is ignited. The oven will then reach desired temp. During the bake cycle the flame will go out and the igniter will come back on, but the flame will not take place until one of the cook top burners is turned on. If you leave the top burner on low the bottom heating unit cycles on and off quickly. The oven does not maintain the 350 degree setting, but the display never changes ( stays at 350, with thermometer in oven falls to below 300). I have ohmed the temp probe with the results being 1080 ohms at room temp.