Ensure your oven has reached the full temperature. AGA ovens require the temperature to be reached fully for the heat to saturate the oven. Depending on your model, preheating time can vary. Most models require up to 75 minutes to reach the full temperature. AGA Dual Control ovens will take eight hours, and AGA hotplates preheat in 11 minutes. When cooking on the base of an oven, use the floor grid to prevent the bottom of the food from overcooking. Check to make sure the baffle plate hasn’t been moved. Some models require this plate to ensure that heat spreads evenly. If you’re still experiencing issues with uneven cooking, contact Priority Appliance Service for AGA oven repair.