Originally Posted by Bigd9
Certainly not an expert here, but to me based on your comments the problem it points to the thermostat (temp control) or maybe the thermocouple inside the oven.
I guess you have checked the flame and made sure it looks normal, right?
Thermostat controls the oven temp by controlling the main flame
As temp drops thermostat should respond by increasing the Main Flame size and then decrease it again when temp reaches set point
Thermocouple is usually heated by pilot flame so the milliamp generated by thermocouple keeps the gas control OPEN
What Model is this Magic Chef????