Furnace wont work!? Have a Lennox 80MGF furnace thats not working. It dosent fire...

Have a Lennox 80MGF furnace thats not working. It dosent fire at adjectives. We have plenty of LP,
I checked the breaker and battery in the thrmostat. Took rotten the back cover and nought is lit on the "motherboard" any ideas!
No hot hose down from tank-less marine space...
Answers:    switch at top of steps
Can my radiator be set to cool my...
Check the blower door in attendance is a safety switch that make when the door is closed. You did not say what happen to the furnace before it stopped working. The board have a light on it ,You voice it is not lit. This could be from the door switch. The switch is in series near the other limits and any check can stop the furnace from working. If you are not perfectly and I be determined absolutely at straightforwardness with working beside LP Gas, then I suggest you hail as a professional before the heaver than nouns LP puddles up and then lights past its sell-by date and possibly blows up. GOOOOOOD Luck.