Random F3 errors while sensor resistance normal at room temperature

Oven Repair (including Ranges and Cooktops)
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Dear smart people,

Thank for helping. My in wall electric oven GE JTP15WW1WW randomly gives me F3 errors during operation while the resistance for the sensor is normal at room temperature and during operation when tested via the control panel connection.

The resistance measures 1585 Ohm at around 420 degree and 1000 Ohm at room temperature. (temperature measured with a oven thermometer.)

Usually cutting the power then turning it back on fix the problem temporarily, but after 10 minutes the error message happens again.

How do i fix this problem?
Again, thanks for the help.

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Here are your parts
http://www.appliancepartspros.com/partsearch/modelsearch.aspx?model=JTP15WW1WW

Usually cutting the power then turning it back on fix the problem temporarily, but after 10 minutes the error message happens again.
I am assuming that by cutting the power you mean flipping the breaker off.
This points to the control board being bad and it is resetting when you kill power to it.