My oven is not baking evenly.
Do not attempt service or replace parts of the appliance unless referred to in the owner's manual. Follow all safety precautions provided in the owner's manual.
Air flow within the range has the greatest effect on even baking. If the oven dimensions are different from your previous range, baking results may be altered. Also, pans placed too close together or too close to the oven walls will inhibit air flow. Be sure to allow at least two inches between pans and from pans to oven walls.  
 
Bent or warped pans can result in uneven browning, and different types of metal pans produce varying results.  
 
Check to make sure the range is level for proper baking results.  
 
Do NOT cover the oven racks with aluminum foil.  
 
Make sure the oven has been preheated to the desired temperature.