I have a 2016 Montana 3440RL. I've wintered in it the last few years but recently I've noticed a horrible smell that waifs into the RV itself while the furnace is running. This is not the normal propane smell but something different. There is a blueish white exhaust coming from the furnace and we noticed a carbon build up in the exhaust itself. I took off the panel and cleaned out the carbon as much as possible with a vacuum, of course I turned it off until we can figure out the issue, and I put out calls to RV mobile tech (but so far no call backs and it's getting colder). Can anyone recommend anything to try or a good RV furnace video) I've watched all the basic ones). Since cleaning it out we still get the odor and blueish white smoke. We do have a CO2 detector and are not running the furnace at all (except to try and fix it). -- We have since topped off our propane tanks to make sure they're not low and the problem persists.
Check to make sure there isn't a spider in where the gas shoots into the furnace. Make sure the burners don't have any obstruction. Make sure the little vents on the end of the burners are clear and open. That is how the burner gets air to burn correctly. There shouldn't be any carbon buildup in there. Propane burns very clean.
Thank you I do think that could have happened. Do you have any sources for where I could learn "how to" get deeper into the unit? I've gone as far into it as I can without more information. I've watched several videos on how to disassemble RV furnaces but nothing that matches my Montana enough to make sense.
Thanks the whole spider thing could definitely be an issue. Do you know any where I could find out more about how to get into the area with the burners? I can get to the exhaust but not sure how to get any deeper into the unit itself. I've watched a bunch of videos but not found anything that looks similar to my unit.