To accurate Joe.
The draft inducer fan receives the signal from the stat and starts. The glow plug lights the burner which remains lit until the blower motor starts up. Once the blower motor starts the flame stays lit for approximately 5 seconds before shutting off.The blower motor continues to run as if it were cooling the heat exchanger for about a minute or so.
I tried removing the access panel to see if the unit was starved for return air, but I have the same problem. There are no flashing LED codes to help diagnose the problem. My condensate pump is hooked up and functional. The gas pressure in my home should be okay since my other gas appliances are all working normally.
I have a CO detector in the home. No issues there.
Any thoughts ??