Preway oven doesn't come to temperature
I Also have a wall oven by preway in a 1955 spartan trailer, basic same problem, I am told the control assembly that you turn to set temperature needs to be replaced, if it is adjusted to far on some part behind the controll knob it will screw up the new one also, Spencers appliance in Portland Oregon worked on mine years ago and was able to get parts, Good Luck
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