I started removing the appliances to figure out if the worked or not. I didn’t feel safe plugging the camper in and testing everything in the camper since there were mice, wasps, and god knows what else living inside this thing. I’m super glad I did this because the appliances were packed with mouse houses.
Stove removed and mouse house removed under top.
Stove vent fan removed and bird nest removed.
Furnace removed and several mouse houses removed and wasp nests that filled the exhaust and intake.