Check the oven’s user manual for calibration instructions
Place an oven thermometer in the center of the oven
Preheat the oven to a set temperature, such as 350°F
Wait until the oven finishes preheating and stabilizes
Compare the oven’s displayed temperature with the thermometer reading
Repeat the test at least once to confirm the difference
Determine whether the oven runs hot or cold
Access the oven temperature calibration setting if available
Adjust the temperature up or down according to the manual
Save the calibration setting
Recheck the oven temperature with the thermometer
Repeat adjustments until the oven temperature matches closely
If no calibration setting exists, note the temperature difference and adjust cooking temperatures accordingly
Clean the oven sensor if the manual recommends it
Contact a qualified technician if the oven cannot be calibrated properly