Hi my gas stove is having problems, the front 2 burners won't lite also the oven and broiler won't lite, I can lite the burners with a match so the gas I don't think is the problem. When I lite the oven I hear it click and the gas come on for a few seconds then off again, usually you would hear the oven lite up in these few seconds, what part do you think I need?? And where should I look for it??