I really didn't like the battery-operated fan available for RV refrigerators. I didn’t like the size, or changing 2 giant D-sized batteries. Also, it took up shelf space.
So, I made my own.
I took a 70x70x10 mm computer fan, and a DC-DC Buck converter and a power switch and wired it up to the power feed for the light inside the refrigerator. It's wired before the switch so that the fan works while the door is closed and when the light is off. I added a 12 mm latching power switch so I can turn off the fan if needed, but it does turn off when you switch off the RV refrigerator.
I used the DC-DC buck converter to step the 14-12 Volts DC the camper runs on to 6 Volts DC so that the fan spins slower and uses less energy and is quieter. It does not take a lot of air speed to circulate the air. And before I installed it, I printed up some small spacers and super glued them to the back of the fan to keep it in place and flush up against the wall of the refrigerator (see pics).
I also printed up some .060-inch spacer to go behind the light to make room for the new wires. I cut these to shape with scissors when I installed them.
Lastly, I used some E6000 glue to coat the electronics (protect them from humidity) and keep everything in place.
It works exactly like the Camco one, but does not take up any shelf space.
Here are the links to the items I used.
70x70x10 mm PC Fan: https://amzn.to/4h4LcM8
12 mm Latching Switch: https://amzn.to/4dLOscB
Mini DC-DC Buck Converter: https://amzn.to/4dLOHV3