I have a tappan oven and when I try to bake the orange light glows but the burner will not ingite or if it does it is a very small flame. I smell gas but I don't think that it is getting to the burner like it should. Could you please advise me what might be wrong with it and what the part number would be and the cost. The serial number is VF24607302 and the model number is TGF336 AUD. Thank you, Debbie Jones:)