Hi, thanks for using JustAnswer.com. I suspect your ignitor has gone out. This unit uses an ignitor like the one pictured below, which comes complete with the burner tube. The part number is(NNN) NNN-NNNNand is available at www.myapplianceparts.com or from your local parts retailer. The other diagram gives a breakdown of the range and the ignitor ass'y is part # XXXXX in that diagram.
How can I test it so I know that is the problem before spending the $65 for that part.