if your going to quote me
keep it in context
i did mention the need for 12v
there is NO proper reason for an RV absorption fridge to have to have a 'converter' plugged in, even for 120v operation
it does use 12v control circuit, but if the battery is charged
it should work on 120v or LP with a 'converter' unplugged
the way the OP said it, the converter is already unplugged and the fridge only works if the converter is plugged in
that would make the converter in series with the fridge
something is NOT correctly stated or wired !