When I use my GE Wall oven at temps higher than 400 or broil after about 15 minutes the disoay reads F9, LOCKED. After 30 minutes I can use it again as long as its 350 or less. The oven is rarely used and only one year old. Also the control panel gets really hot.
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First of all, most oven thermometers move very slowly compared to the electronic sensors and controls on the oven. To make sure you are getting an accurate reading, the thermometer should be in the center of the oven, the oven should be preheated, then wait another 20 minutes after the preheat beep. If the temperature is less than 35 degrees higher or lower at this point, it can be adjusted via the controls. Usually on GE ovens you press and hold bake and broil at the same time until SF comes up in the display. Then press bake, then use the arrow keys to raise or lower the temperature setting. If the temperature is more than 35 degrees off, you may have a bad sensor, bad control board, or other problem.
Is it continues to heat up then its working fine...if it continues to heat pass 400 then your have a thermostat problem and the oven is out of control. I do believe that the display is not an actual reading of the oven temperature, instead it is a reading of where the operator has set the temperature to . I have yet to see an oven with a actual reading temperature display.
Thanks for using FixYa. Error F3 in your range/oven means oven temperature sensor circuit failure. To resolve this issue you’ll have to check the oven temp. sensor circuit if the reading is more then 1100ohms then it should be replaced. Please do rate the solution if the issue is resolved or post a comment for further assistance.
If both baking and broiling element do not heath above
a certain temperature instead, then the part to be replaced is the
temperature probe, still located inside the oven cavity.
If the part that is not heating is only one element, then you may need to replace
Before replacement the element can be tested
removing it from the cavity and reading Ohms at the element terminals,
with a multimeter set at Rx1. Disconnect power before removing the
element. In this case, selecting only baking or only broiling (depending on what element is faulty), the oven will work normally.
If the oven is a gas oven, then you have no element. In that case if the oven burners are working, replace the temperature sensor.
If replacing the temperature sensor does not help, then replace the oven electronic control.
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Oven temp sensors sense the temperature is the oven cavity and the temp sensor changes resistance, this change in ohm resistance tells the oven control what temperature the oven cavity at and tells the control to shut off the element or turn it back on. The most common temp sensors used today ( *not all ) are approx 1000-1100 ohm resistance at room temperature ( 70�F ) Some ohm readings and there temperature: Degrees F - Resistance 100 - 1143 ohms 200 - 1350 ohms 300 - 1553 ohms 350 - 1654 ohms 400 - 1753 ohms 500 - 1949 ohms