Re: furnace help
If the flame lights and then goes out immediately, there is generally 3 common causes.
1- The flame sensor is dirty or defective.
2-The flame is not going all the way across the burner because it is dirty.
3- Your flue pipe is dumping into a large chimney and you are not getting the proper draft. You would need a flue liner installed the same size as the flue pipe going all the way up and out of the chimney.
Be sure you live your life, because you are a long time dead.-Scottish Proverb