kitchenaid oven will not maintain temperature after it preheats to desired temp

[grumpy]

Model Number:
Brand: Brand
Age: Less than 1 year

Model Number:
Brand: Brand
Age: Less than 1 year

Model Number: KEBS107SSS04
Brand: KitchenAid
Age: 6-10 years

Oven will not maintain temperature after it preheats to the set temperature. It preheats to say 400deg preheat light goes out but never comes back and oven cools down. If you turn it off and back on set to 400deg and it may show 325deg and start preheating again to 400deg but will not maintain temp after first preheat.

[denman]

Sounds like a control board problem.

I am assuming that the preheat is actually the correct temperature in the oven and that the preheat time is normal and not longer that it used to be,