Atwood furnace
I have a trailer with a Atwood 7920-II furnace. I have worked it down to the point it gives a code 3 for ignition lockout fault. Does anybody know what that means or what might be causing it? I am gue...
Forum Discussion
49ford wrote:
I got the furnace working. After failing to take it completely out of the RV. I started taking every screw I could reach out of the furnace. On the right side of the furnace is a small spiral housing that eventually came off and out. It had the fan motor and squirrel cage fan and a small blower fan on it. On taking it out, I saw a mud dauber nest completely blocking the inlet. Cleaned it all out, checked the sail switch while I was in there. Put together and it worked.
Cautions. Don't try to pull the unit out from the inside by cutting around the exhaust flange. You will have stuff to fix.
Put a BUG SCREEN on the furnace outlet, not door screen, a slightly larger mesh screen for the RV furnace.
I hate mud daubers! But I know a heck of a lot more about furnaces than I did a month ago.
Thanks for letting us know that you found the problem.
