Electric ovens & cooktops

Oven runs too hot or too cold compared to the set temperature

Food that consistently burns or undercooks despite following recipe times usually means the oven's actual temperature doesn't match its setting, most often from calibration drift or a failing sensor.

Difficulty
Easy
Time
20–40 minutes
DIY cost
$15–$40
Pro cost
$120–$250

Symptoms

  • Baked goods consistently burn on the outside before the inside cooks
  • Food takes much longer than a recipe suggests
  • An oven thermometer reads differently than the display setting
  • Preheat indicator beeps but oven isn't actually at temperature yet

Likely causes

  • CommonOven temperature calibration drifted off over timeMost ovens allow a calibration offset adjustment to correct gradual drift from the true temperature.
  • CommonFailing oven temperature sensor giving inaccurate readingsA sensor reading incorrectly causes the control board to over- or under-power the elements.
  • PossibleOven door not sealing properly, letting heat escapeA worn door gasket lets heat escape, making the oven run cooler than its setting despite the element working correctly.
  • PossiblePreheat indicator beeping before oven is actually at temperatureSome ovens signal preheat done a bit early, before actually reaching full temperature, which can be misread as inaccuracy.
  • Less commonFaulty control board misreading sensor inputA board fault can cause inaccurate temperature regulation even with a good sensor.

What to do

  1. Place an accurate oven thermometer in the center of the oven and let it preheat fully to a set temperature like 350F.
  2. Compare the thermometer's reading to the set temperature after the oven signals it's ready, waiting an extra 10–15 minutes for full stabilization.
  3. Check your owner's manual for a temperature calibration/offset setting, which is often accessed through a button combination.
  4. Adjust the calibration offset in small increments (10–25 degrees) based on the thermometer difference, then retest.
  5. Inspect the door gasket for gaps, tears, or looseness that could let heat escape.
  6. Close the door on a piece of paper at multiple points around the seal; if it pulls out easily, the gasket may need replacing.
  7. If calibration adjustment doesn't fix a large or inconsistent discrepancy, have a technician test the temperature sensor.

Tools and parts

  • Oven thermometer
Oven door gasketSearch: “oven door seal gasket replacement”
Oven temperature sensorSearch: “oven temperature sensor replacement”

When to call a pro

If calibration adjustments don't correct a significant or inconsistent temperature discrepancy, have a technician test the sensor and control board.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.