Reposted from another refrigerator thread:
You might try a recirculating fan in the refrigerator section. This will help even out cold and hot spots on the inside, and may bring the temperature down. Also, RV refrigerators don't recover quickly from opening the door; so limiting how often and long the door is open will help tremendously (hard to do if you have kids).
Note: Item also available at WalMart and Camping World.