The only other thing I can think of is the auto light flashing? If it is then it may not turn on. We have a slightly different model with it's own griller, but if it's set to auto with the light flashing it won't turn on, that setting on ours is to turn off the oven at the end of a set time. You have to reset it to auto or turn it off (the auto) to get it to turn on again.