Oven temperature is consistently too hot or too cold compared to the set temperature; food overcooks or undercooks without error codes.

Safety first: Allow the oven to cool before placing or removing thermometers.

• Verify with thermometer: Place an oven-safe thermometer in the center of the middle rack. Preheat to 350°F and allow 15–20 minutes after preheat. Compare the reading to the set temperature.
• Adjust calibration: Many Summit electronic controls allow temperature offset. Refer to your manual to adjust the oven temperature up or down (often in 5–10°F increments) to match the thermometer reading.
• Inspect door gasket: Check the door seal for gaps, tears, or hardened sections. Replace the oven door gasket if it does not seal evenly all around.
• Check sensor: If calibration cannot correct a large error (over 35–40°F), test the oven temperature sensor resistance at room temperature and compare to specifications. Replace if out of range.

Always test temperature accuracy after any repair or adjustment by baking a known recipe and monitoring results.