Why Is My Oven Burning the Bottom of My Food?
If food is consistently burning on the bottom while the top is fine or undercooked, something is wrong with how heat is being distributed or regulated inside your oven. The most common causes are a faulty heating element, incorrect rack position, oven calibration issues, or bakeware problems.
1. Bottom Heating Element Is Running Too Hot
In electric ovens, the bottom bake element provides most of the heat during standard baking. If this element is failing — cycling on too frequently or not shutting off properly — it will scorch the bottom of food before the top has time to cook. Signs of a faulty element include:
- Visible blisters, cracks, or burn marks on the element
- Uneven glow when the element is on (bright spots vs dark spots)
- Food consistently burning at the bottom regardless of temperature setting
A faulty bake element should be replaced by a qualified appliance technician.
2. Oven Temperature Calibration Is Off
Ovens can drift out of calibration over time, meaning the actual temperature differs from the set temperature. If your oven runs 25–50°F hotter than it should, the bottom of baked goods will burn before the rest is done. Test with an oven thermometer:
- Set the oven to 350°F and place an oven thermometer in the center rack.
- After 20 minutes, read the thermometer. If it's significantly higher than 350°F, your oven runs hot.
- Many ovens have a built-in calibration adjustment in the settings menu. Check your manual.
- If calibration is severely off or the oven won't hold temperature, the temperature sensor (oven RTD) may need replacement.
3. Rack Position Too Low
Placing bakeware on the bottom rack puts it too close to the bottom heating element. For most baking, use the center rack. Only use the bottom rack for items that need direct bottom heat like pizza or crusty bread.
4. Dark or Thin Bakeware
Dark metal pans absorb more heat and can cause overbrowning on the bottom. Thin, cheap pans have poor heat distribution. Switching to lighter-colored, heavy-gauge aluminum pans or using a baking stone can solve this problem without any oven repair.
Why Are the Bottoms of My Biscuits Always Burning?
Biscuits are especially prone to bottom burning because they're small and baked at high temperature. Solutions:
- Use a light-colored baking sheet lined with parchment paper.
- Place the rack one position higher than normal (center-upper instead of center).
- Double-pan: stack two baking sheets together to insulate the bottom from direct heat.
- Reduce oven temperature by 25°F and bake slightly longer.
5. Convection Setting Issues
If you're using convection, the hot air circulation can increase the effective temperature at the bottom of the oven. Reduce the set temperature by 25°F when using convection, and always use the center rack or higher.
6. Oven Temperature Sensor (RTD) Failure
The oven temperature sensor tells the control board how hot the oven is. If it's reading low, the oven will overheat trying to reach the set temperature. This is different from calibration drift — a faulty sensor can cause extreme temperature swings. Symptoms include wild temperature fluctuations, error codes on the display, or the oven being significantly hotter than the set temp even after calibration.
Frequently Asked Questions
Why does my oven burn the bottom of everything I bake?
The most likely causes are a faulty or overactive bottom heating element, oven calibration being off (running too hot), rack position being too low, or dark bakeware absorbing too much heat. Check rack position and use an oven thermometer first before calling for repair.
How do I stop my biscuits from burning on the bottom?
Use a light-colored, heavy baking sheet lined with parchment paper. Move the rack to a center or upper-center position. Double-pan if needed. You can also reduce oven temperature by 25°F and bake slightly longer for more even results.
How do I know if my oven heating element is bad?
Look for visible damage — cracks, blisters, burn marks, or bright spots in the element when it glows. Inconsistent heating and food consistently burning at the bottom are also signs. A technician can test the element with a multimeter to confirm failure.
How do I calibrate my oven temperature?
Use an oven thermometer to check the actual temperature vs the set temperature. Many modern ovens have a calibration offset setting in the control panel menu — consult your owner's manual. If the oven is more than 50°F off even after calibration, the temperature sensor likely needs replacement.
🔧 AWS Domestic Appliance Repairs provides expert appliance repair across Atlanta and 100+ surrounding communities. Call (833) 747-4838 for same-day service.