Set temperature to 350, beeps that ready, but oven thermometer reads 150.
Set temperature to 550 and oven will get to 350 in a couple of minutes, but continues to rise.
Set temperature to 475, but oven temperature continues to rise.
Set temperature to 425, and oven temperature starts to drop, and continues to drop.
Have been unable to find a temperature that will enable the oven to remain at 350.