Okay, so, thank you everyone for the help. What I ended up doing was rebuilding it myself with supplied parts from PDX RV LLC for about $60.
http://pdxrvwholesale.com/products/atwood-hydroflame-furnace-model-8940-dc-iii-tune-up-kit
I replaced the sail switch, limit switch, burner assembly and orfice, and electrode.
The furnace works great but now when the RV gets to temperature and the furnace shuts down, obviously the room temp will lower and the furnace will not turn back on. The only way I can get it to turn on is either turn the breaker off for a few seconds and turn it back on or turn the thermostat off for a few minutes then turn it back on.
Again, any help would be great.
Thanks again in advance.