I found a great link today on RV refrigerator basics; it includes a video with info on RV fridges. The site has lots of other valuable info as well: http://www.rvuniversity.com/staticpa...Efficiency_101
I also found some great tips on an RV forum. If you are interested, check this out: http://www.forestriverforums.com/for...cold-6620.html
The best ideas (to summarize):
1. Use a fridge fan (battery powered) pointing up inside fridge, toward the front, on bottom shelf. It circulates the cool air and can speed up cooling by 50%.
2. Use a fridge fan (specifically built for this) in one of the back vent areas to help cooling. This can speed up cooling by 40%.
3. Cool the fridge for 24 hours before leaving. This gets it cool so it doesn't take as long when you get to your destination. Freeze a couple of jugs of water before leaving home and put them in the fridge before taking off. They help keep the fridge cool while traveling and you have cold drinking water when you arrive.
4. Food can spoil at 40 degrees or warmer, so best to put perishables in an ice chest while traveling.
5. Propane mode cools faster than electric.
6. If it is very hot where you are camped, cool the inside trailer temp for more efficient fridge cooling.
7. Operating a fridge when it or the trailer are not level can cause permanent damage! So, if you have the fridge on propane while traveling, stop for lunch for an hour or so, and the trailer is not level, turn off the fridge while you are stopped! While the trailer is moving (and fridge is on propane), this is not an issue. Just when it is stopped for a period of time.