I looked up a few possible reasons a gas oven wouldn't heat properly and discovered the igniter was discolored. While taking it out I discovered how fragile the burner could be when I snapped the igniter. I went online to get some advice and a video from AppliancePartsPros.com showing how to replace the burner which included all the safety steps involved - and a warning about the fragile areas of the part. I ordered the new part and followed the instructions from the video and... the oven worked again. I felt very pleased.