My fridge in my '87 Westy is showing the same symptoms.  Not working on
gas but is definitely working on the 120vac.  Went camping for the week
last week and Wednesday the fridge quit getting cold on propane.  It was
working when I left on Saturday and the fire was still lit as I checked
the exhaust pipe and it was hot but no cold.  Tried on the 12vdc while
driveing home and it seemed to cool off a bit but it never did get very
cold on the 12vdc.  Last night I pluged in the 120vac line and turned on
the fridge and with in a half hour the fins were definitely cold.  I
checked it later on and it was very cold.  I don't understand what's
happening here either.  If the heat is applied to the same spot by all
three sources then why would it not get cold with the propane running ?
Propane is definetly working !  Any answers would be appreciated.

Cheers

Frank

--
              *  Frank Condelli  *  Almonte, Ontario, Canada  *
                      *  ad793@Freenet.carleton.ca  *
                   '87 VW Westy, '69 MGB & Lionel Trains
                http://members.aol.com/RAlanen/index.html