Thank you for contacting Fixya.com. First you need to check whether you are getting full 220 volts + to the oven. Some oven controls have adjustable knobs where can be fine tuned. The temperature can be calibrated by 25 degrees but not any 200 degrees. I think these can get you may be up to 75 degrees max. It seems like your sensing bulb is mounted right your oven control which has the sensing bulb attached could very well be shot. Also check if the elements work? Does the broil get red when set on broil; does the bake get red when set on bake? If yes the wiring should be ok and possibly/probably is a bad oven temp control. If the elements do not get red, that would have to be investigated (burnt wire, bad selector switch, bad oven control, burnt wire. Turn on the oven with the meter connected. It should show full voltage when you first turn it on and the thermostat will turn it on and off. If the sensor inside the ovens baking compartment is not damaged, touching any metal part, bent, pitted, no foil is used on the racks or lower plate, in an attempt to keep ovens internal clean, etc, then temp sensor is likely defective. Which means the ECR (control unit) will need to be replaced. Please get back to us if you have any further query. Have a nice day.
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