if the room is TOO cool, the freezer will not be cold.

this is counteractive but true as I will explain below

the temperature control in in the fridge, not the freezer.

When the fridge gets too warm, the compressor comes on and cools both the freezer and the fridge. If you want the freezer to be cooler, adjust the door between the freezer and the fridge to be more closed.

Also consider, if you set the fridge temp to say 47 and the room temp is 47, the compressor will never come on and the freezer will warm to 47.

The controller measures the fridge temp, usually not the freezer temp.