The insurance companies say "Never run with gas on" Of course most modern RV fridges no longer have the 12 volt option, the reason for this is the tow vehicle can't pump electricity to the trailer that fast.
Now, the logic: The FRIDGE is one of the major causes of fires in RV's. the insurance companies seem to think running them on propane is more likely to cause them to go up in smoke.. And in this they are likely right, say 52/48 percent or so (That is small difference) Plus if you got hit,, "Just right" it could rupture the propane line and cause a magor conflagration..
What they forget is an FMCA rally or other event where RV's are packed into the grounds like sardines. At many Rallys if they are on a fairground there may be limited electrical hookups, so you Boondock, and that means running the fridge on propane.
So there I am in 100,000 worth of Gasser,, Next to me (Not at this event) is about a half million of Provest Diesel pusher.. My fridge goes up and takes the provest out and the one on the other side of me, as well, before FD can get there. OUCH!!!! Law suit time (Thankfully that did not happen)
Or, I'm toolind dong the freeway when it catches, Mr. Prevost dropps back about a quarter mile and radios me Hey buddy, You on fire!!!. Either way my rig is toast. but this way his.. Not so much as smoke damage.
To Steve and DEE.
Depends, Gasoline, no, Diesel no, Propane yes Where the fridge is on my rig gasoline vapor could only reach it if I hosed the side of the RV. (My rig is a gasser) Propane, however, ... Well, lots more bad things can happen when filling propane tank.
When I pull up to the propane pump, I hit the 12 volt disconnect (STORE) switch and shut down EVERYTHIGN (this kills furnace, fridge and Water heater, All open flames save stove/oven which are never in use at that point in time).