Thanks to all who responded.

It seems I had a standard problem with the propane circuit of
the 3-way fridge which caused the fridge not to work on propane
anymore. Basically, the circuit was plugged up with dirt, rust,
you name it. I did the following and now the fridge works like
a charm.

1 - remove the Flue Vent (metal cover where fridge gets and
    spits out air on outside of van)
2 - disconnect gas line to fridge (accessible by removing metal
    grill on left side of fridge)
3 - disconnect other wires which bring current from battery and
    110v plug (accessible through dish cabinet under sink)
4 - remove the fridge (screws accessible in side cabinets and in
    front)
5 - the combustion chamber is at the bottom left corner of the
    fridge in the back. Open it and clean out the dirt.
6 - blow compressed air up through the large vent pipes and
    through the tube which runs along the bottom of the
    fridge from the combustion chamber to the front (it has
    a screw-on metal cap)
7 - re-assemble it all

My combustion chamber and tubes were *really* dirty. It would
probably suffice to blow compressed air through the tube which
comes out the front if the system wasn't so plugged up. The dirt
should blow out of the flue vent so it's probably better to
remove the cover plate of the flue vent first. But at least you
don't have to take the fridge out. I will try to remember to
do this regularly so that the dirt doesn't accumulate.

Cheers!

Darie
'86 Westy