My Whirlpool range Model WGG755S0BS01 top oven pre-heats and reaches the set 400 degrees temperature. The oven cycles on and off and maintain the set 400 deg. temperature inside the oven for about 35 minutes. After 35 minutes of normal operation, and even though the digital display still shows the set temperature is 400 degrees and the bake light is on, the temperature inside oven drops. Once temperature drops the ignitor glows and stays on but the oven does not start. No gas smell is observed or identified.
If I cancel bake, and re-start the bake process again, the oven starts and the 35 minute process repeat again.
Please note that even after installing a new Clock Control board and a new oven ignitor, the top oven did the same thing and nothing change. The oven works normally for about 35 minutes maintaining the 400 degrees then stops heating.
Please help and suggest.