Propane smell inside trailer...how to best diagnose?

Your factory installed propane alarm is designed to be very sensitive, if still functional. It should work better than your nose!

Often times an RV furnace, or oven will give off an odor, when new, or when not used for a lengthy time. This will go away with use. If only running for 5-10 minutes, it may smell again next time.

You can purchase a small propane gas detector, that will fit in hard to reach areas. They are not expensive, google will help you.

Jerry