Dryer will fire up but after about ten minutes the flame goes out. Then the igniter will glow every couple of minutes but it will not light. After it cools down it will fire up then the whole process repeats. It is free of lint and the exhaust blows strong. The unit is 11 years old so it might be time for a new one, but if it a easy fix I would like to try. Times are tough. I have read that it could be the burner coils. But could be other stuff as well I don't know a lot about electronics and don't have a good understanding of ohms and circuits. Could someone help me diagnose this problem or give me your opinion if a new one is in order.