RV Absorption Fridges have no moving parts.........no motors, no compressors etc.
YOUR Dometic does have 2 fans mounted mid-center of fridge (above absorption coils----larger tubing you can see from lower vent/access cover) The 'X' in your model number denotes 'fans'
The fans are temp controlled via a t-stat mounted on condenser fins at top of fridge.
Fans pull air thru lower vent and push air out upper vent. They help increase the draft needed for cooling.
If you are hearing noise them fans are suspect and lack of cooling is due to poor ventilation or bad cooling unit
Hopefully it's bad fans/
HERE is manual for your model. pg 34+ covers the fans