Oven stays at the same temperature?

the shaft from the knob to the selector/thermostat may be broken, take the top off the oven and when you turn the knob watch if the selector switch turns at the same rate, if not its damaged by being forced back beyond the off position and will require a replacement. if it looks ok the stat must be faulty, it just pulls off the back of the selector to remove

keymatic
January 2012