how can i fix my chef f/forced oven model eoc641s?

my chef f/forced oven is not heating up. I have replaced the oven element recently. The fan still comes on. The griller works fine but i noticed it doesnt really cool down when you select a lower temperature the element stays really bright red. The digital clock/ timer works fine,and it turns the oven and griller on and off when set. Could anyone please help. Kind regards jen