When I burn the propane furnace on my 2016 Fleetwood Bounder it smells horrible. I thought at first it was just because it wasn't used much, but it seems to be burning very rich, the smell is strong and it will set off the alarms inside the coach. I did notice that there is a thick smoke coming from the exhaust, on our other coach it was just warm air coming from there. Is there a way to adjust this or do I need to take it to a technician? Thanks for any help.