YOUR AC/Gas fidge has two fuses on lower circuit board
One 5A for AC electric heater element (Horizontal---center of board)
One 3A fo DC (Vertical--left side of board)
***Fridge will Not function w/o DC Voltage---No AC operation or propane operation----no display panel lights/no controls
Your thermistor is functioning otherwise the AC would not properly cool
Only one thermostat and one thermistor.
Thermistor is the 'sensing' probe that the non-adjustable t-stat uses to control cooling cycles (turning heat source on/off be it AC or Gas)
Thermistor attached to far right cooling fin in food compartment.
AC Works...Gas doesn't
That suggests lower circuit board gas circuit is bad.
To test...
Check for DC Voltage at P3 plug Lower Board (upper right corner)
S/B DC Voltage between Terminal 1 (WHITE) and Terminal 2 (YELLOW) when on GAS and fridge is warm enough to call for cooling cycle
See pg 11
LINK...Service Manual
