I have a brand new LG Electric range Model :LRE4215ST the oven temperature has extreme varying from over cooking too under cooking food items . When in normal bake cycle the fan continually runs 20 seconds on 20 seconds off and is noisy when operating. The temperature sensor, motherboard, relay board were replaced by LG techs . The problem continues to happen .LG tech support says this a normal situation . We try to use oven but have to throw out the food items because its not safe to eat. The cook top elements are overheating and burning food items , we cannot even boil and egg. LG continues too says this normal They are refusing to accept responsibity for a defective appliance

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