Testing the thermal accuracy of a residential kitchen oven involves performing a simple, objective temperature check using an independent mechanical or digital oven thermometer. First, hang or place the independent thermometer directly in the center of the middle oven rack. Second, set your digital oven control panel to 350 degrees Fahrenheit and allow the oven to preheat fully for at least twenty to thirty minutes. Third, open the door quickly and read the thermometer. You can troubleshoot temperature accuracy easily. You can verify that your oven temperature is accurate when the thermometer reading matches your digital display within a strict 15-degree tolerance; any larger variance indicates a calibration error or a failing temperature sensor probe.
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