<<Thanks. This system (ammonia/hydrogen/H2O continuous absorption type) is not
like a regular freon/compressor type refrigerator, so I will be very excited
to hear if you've found someone who can recharge it. My initial question
still remains unanswered, however: How can the thing make ice on 110AC and
barely function on propane, when the propane burner system is performing as
well as the AC heater element?>>

Coby
I would think that the basic difference will be found in the difference in
efficiency with which heat is generated and transmitted to the ammonia et al.

In our case, we found that the combustion chamber had a layer of ash and the
burner jet was partially blocked and the heat transfer pipe (exhaust) had a
coating of ash. We cleaned up and now it actually gets cold in there. :-)
Larry