Oven Not Heating Due to Gas Igniter Failure

In gas ovens, the igniter must glow bright orange or yellow to signal the gas valve to release fuel. If the oven fails to reach temperature, observe the burner area during a preheat cycle. If the igniter does not glow, or if it glows but the burner fails to ignite with a standard 'whoosh' sound, the igniter is likely weak or dead. Verify that the gas supply is fully open by testing stovetop burners.