>For high altitude problems, you can install a smaller jet (prolly not
>available) or adjust your regulator to lower pressure

Get a set of "numbered" drill bits and use the bits to determine the size of
the original jet.
Get a propane torch and solder up the hole in the old jet.  Drill out the
soldered up hole to the new smaller size.
Use a dremel or similar high speed tool as the drill.

I've never done this with a Dometic fridge, but that's how I rejet furnaces,
old cars, motorbikes etc.

Gary Lee
Honda XR600R, rejetted many times
http://www.telusplanet.net/public/gary2a/rack/vanagonrack.htm