Is this a GAS range? Or an ELECTRIC range?
If this is a GAS range and the broiler is working, more than likely you have a worn igniter on the bake manifold that needs to be replaced. A glowing igniter does not necessarily mean it is good. The following link explains a little theory on how these igniters work and how to replace them:
If this is an ELECTRIC range, more than likely the lower heating element for the oven (Bake) is defective and needs to be replaced. The following link epxlains how to replace a heating element on an electric range:
Since all the oven features on either a gas or electric range are controlled by the Electronic Range Control (ERC) board, and the broiler IS working, it may be safe to assume this is not a control board problem.
Replacement parts (if required) can be purchased at any of the following websites:
All these sites are reputable and offer great service with competitive pricing, so shop and compare. The first three sites I have listed also have helpful exploded view parts illustrations to assist you in locating and properly identifying the parts you need. NOTE: The ERC is also known as the Electronic Oven Control (EOC) board on some models.
If you have questions about this repair, please post back with your MODEL NUMBER so that I may be able to provide you with a more difinitive solution. I hope this helps you.