I am a new member and am trying to get a help on a heater no ignition problem. My Sta-rite 400LP heater quitted on making hot water. It starts and runs for a few min as routine before the blower stops working with "Service Heater " LED on. During the running time, there is no hot water come out, only cold air from the exhaust flue. No red diagnostic LED's (AGS, AFS, ...) on. If turning off the heater and backing it on, the procedure will be repeated. On back of the board, red LED11 and green LED8 (9?) are on. I changed the igniter but no help. Any suggestions will be greatly appreciated.