I agree with the oil burn off, we had this happen on Labor day last year.
We did run the furnace during our PDI but only long enough for it to start and I knew how to start it as it was near 100 that day.
At the CG it was early AM and the alarm was very loud, ended up turning the heat off and pulling the battery till later when I could vent the trailer and run the heat to burn off the oil without bothering the rest of the camp.
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping