My frigidaire over will not heat. The burners work and the oven light, but oven will not heat

Ir you have a Gas oven I can give you a suggestion. First check the oven igniter. The Igniter delivers 3.2 amps to the valve anything less willl not let the oven valve open. An easy way to know this also is look at the color of the igniter when on. It should glow bright white. If it glows red, yellow or orange, then it is most likely defective and needs to be changed. If it does not glow at all, then it is also defective. Please be sure to disconnect the power before working on any appliance and always use genuine replacement parts.