Dometic 2 door 3 way fridge not cooling...

[UAHaerospace]

Dometic 2 door 3 way fridge not cooling in the fridge, but the freezer works just fine... 120v power no problem.

is there a 'cavity' or connection between the two areas that could be clogged?

or
how does the 'thermistor' temp sensor work? What does it tell the fridge to 'do'?


thanks : )