You probably need to go through your under storage to get to it as I’m guessing it sits on top of your water heater and likely only has an exhaust port on the outside of your unit.
That’s how our pinnacle is. If you’re looking for the reset switch, it’s on the top and in the middle of the unit and right next to the outside wall.
2018 Pinnacle 36KPTS
2018 Ram 3500 DRW