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Why Does My Oven Cook Unevenly? Causes and Fixes

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Why Does My Oven Cook Unevenly? Causes and Fixes

If your food comes out burnt on one side and undercooked on the other, you’re not alone. Uneven oven cooking is a common problem in UK homes, but in most cases it’s easy to fix once you know what’s causing it.

Below are the most common reasons ovens cook unevenly, along with practical fixes you can try straight away.

Incorrect Shelf Position

Different shelves experience different heat levels. Food placed too high can burn quickly, while food too low may cook slowly.

Fix:
Use the middle shelf for most baking and roasting to achieve the most even heat.
Overcrowding the Oven

When trays are packed too tightly, hot air can’t circulate properly. This is one of the biggest causes of uneven cooking in fan ovens.

Fix:
Leave space between trays and avoid cooking too many items at once when consistency matters.
Fan Not Circulating Heat Properly

If the fan is partially blocked or not working efficiently, heat can build up in certain areas, causing hot and cold spots.

Fix:
Check for grease or foil blocking airflow. If the fan sounds unusual or doesn’t spin freely, it may need servicing.
Inaccurate Oven Temperature

Your oven may not be heating to the temperature shown on the dial or display. Even small differences can affect baking and roasting.

Fix:
Use an oven thermometer to check the true temperature. A faulty thermostat may need recalibration or replacement.
Opening the Door Too Often

Each time the door is opened, heat escapes and the internal temperature drops, leading to uneven results.

Fix:
Keep the door closed as much as possible and use the oven light to check progress.
Warped or Low-Quality Trays

Old or thin baking trays can warp over time, causing food to cook unevenly as it tilts or heats inconsistently.

Fix:
Use sturdy, flat trays and rotate them halfway through cooking if needed.
When Uneven Cooking Indicates a Fault

If you’ve tried all of the above and your oven still cooks unevenly, the issue may lie with a failing heating element or internal sensor.

At that stage, repair or replacement is often the most reliable long-term solution.

Quick Takeaway

  • Use the middle shelf for most cooking
  • Avoid overcrowding the oven
  • Ensure airflow isn’t blocked
  • Check actual oven temperature
  • Minimise door opening during cooking

Small adjustments can often restore even cooking without any costly repairs. If problems persist, it may be time to consider a newer oven designed for more consistent heat distribution.

You can explore the latest CATA ovens or find more practical guides in our Expert Advice Hub.

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