If I understand the freezer doesn't cool but the refer cabinet does and can freeze. Not an expert but I would certainly look for a internal fan not working. Does this problem occur on both AC and propane?
Manuals are often generic and I'd go by the panel.
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2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2014 Grand Cherokee Overland
Bob