Dometic Refrigerator/freezer

I have a 2016 R Pod 176.   The fridge will not cool on gas.  The ignitor will light and the chimney will get hot, but the fridge will not work. I cannot find the model of the fridge anywhere.  The label inside the fridge says 8R series, but I cannot find the model number anywhere.  I think it may be the thermistor, but when removing the outside panel, I cannot find where the thermistor wires plug in so cannot test the thermistor.  Thought about just ordering another one.  Only about $15 on Amazon.  But would like to know where they plug in on the back of the fridge outside.  Also, what might be another problem or problems that I may look at.  Is it necessary that camper be exactly level.  It is almost level, but the bubble on my level is off just a bit...Any help will be appreciated.

I think I found the problem.  The Pod has to be hooked to a DC battery or shore power for fridge to work even when on propane, I think.  I do not have  a battery hooked up to Pod and don't have shore power.