Inspect the back-side for a yellow residue and an odor, presence indicates a boiler-tube failure, which requires replacing the cooling unit (not entire frig).
Before panicking though, try some stuff that costs nothing. Is the thermistor firmly attached to a cooling fin(top rear of frig compartment)?
Go to
Bryant RV download page and download the service manual for Norcold 600 series refrigerators. Follow the flowchart for diagnosing problems.
Hope the service manual helps, if not, return to this thread and re-post your findings-or lack thereof.
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2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA.
" My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy