Originally Posted by richw46
The cold always comes into the freezer then gravity takes it through the fridge. You may need to add a small DC fan inside the fridge to evenly distribute the cold air.
Sorry, but RV refrigerators have two evaporator sections, one in the freezer, one in the refrigerator part. The cold air from the freezer does not circulate to the refrigerator.
The refrigerant first hits the freezer where most evaporates, then it goes to the refrigerator where (in the fin section) the remainder evaporates. If the system has any issues, there is not enough refrigerant left for the refrigerator section and it can become too warm even though the freezer cold enough. Something as simple as putting water into the freezer to make ice cubes takes a lot of the limited capacity of the total system and not enough is left for the refrigerator.
A fan will not change this distribution issue.
So, if you overload the freezer with things that need to be frozen (that is they are not already frozen) they will cause the refrigerator box to warm up.
Or if your system capacity is marginal due to a very hot day, the refrigerator will warm up first, when the freezer is still very cold.
Or if your system capacity is marginal due to problems with the refrigerant circuit itself, the freezer may be cold but the refrigerator too warm.
Or you have a leaking door gasket which is allowing way too much warm air into the refrigerator section.
Always remember, in an RV refrigerator the freezer gets the cooling priority, what is left over goes to the refrigerator. Also remember that there is no interchange between the air in the freezer to the air in the refrigerator section (on virtually all RV refrigerators made in the past 40 + years).
I just wanted to clarify how RV refrigerators work, not trying to be a know it all here.