Ge xl44 sometimes oven gets to temp sometimes no broiler works fine

broiler works fine but oven wont come up to temp. broiler works fine but oven wont come up to temp.

the problem was fixed with a new ignitor for the oven portion of the unit a 68$ item a few screws and 2 wire nuts to fix. the oven reachess temperature in a matter of minutes now.it is impossible to tell if the part is malfunctioning and the only way to tell is by changing it.i believe that the part breaks down from the high heat of the self cleaning use ,which i will never use again the problem was fixed with a new ignitor for the oven portion of the unit a 68$ item a few screws and 2 wire nuts to fix. the oven reachess temperature in a matter of minutes now.it is impossible to tell if the part is malfunctioning and the only way to tell is by changing it.i believe that the part breaks down from the high heat of the self cleaning use ,which i will never use again