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I would say yes, it is safe to travel on propane powered refrigerator. I do it when traveling also and never a problem. Since I do not run the generator going down the road for 110v, propane it is. Besides the cost of gasoline what it is, our generator gives us 8 hours on 5 gallons of gasoline. That could be expensive.
I've read that the fridge won't work if out of level within so many degrees or more.
I have never had it happen until this past weekend, because I usually camp with a 30A hook-up plugged in. Camping at this motorcycle rally over the past weekend+, there were no hook-ups for the RV. No problem I figure the fridge is running on propane. Only thing, I could not get the rig level enough, uphill to the front and the rear tires off the ground.
It seemed level enough I could manage. Then the freezer part began unthawing things in there, and my bag of ice was melting in there. I checked and a pilot light was lit, just that, seemed odd because I usually hear a jet engine sort of sound on propane and no pilot is usually present, it electric spark starts when needed to.
When I ran the generator to supply 110v, the fridge worked great. I figured the refrigerator was okay and just something about the gas mode, or circuit board. Nope.
I learn and share my experience.
About the flame to work the ammonia refrigerant system in there;
The flame from a fire source, especially one in an enclosed space away from a breeze, will always burn with the flame going straight up against gravity.
When you get too far of a point not being level, the flame will not be aligned to the heating tank part properly. The design is to prevent the system causing a fire and that could be detrimental to the rig, and/or life and limb if the flame were heating something it shouldn't be.
A good safety measure for sure.
I am also glad I do not have another "thing gone wrong" with our Thor.
(let's not go there)...
Hope this helps somebody to understand part of how it all works.
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Rusty
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