dwelsher

My oven doesn’t seem to lite. When I press bake the temperature comes on and i can press the + button and it moves up to 550 and and within 5 seconds it goes to 100 degrees and doesn’t actually lite the oven,it stays on 100 degrees without the stove igniting. It has worked for years until today.
does anybody out there have any idea what the problem is? Thank you-dwelsher@netins.net