We have the same brand of oven. On ours, there are two dials--one says 0, 1, 2, 3, 4, and a little thermometer. The other dial has the degrees. We always put the oven on "4" and then select the degrees. We have to flip the power on at the wall for the oven to work. We don't press the range ignition button for the oven.
Does your oven light come on at all, or is it just that the oven doesn't get hot?