Refrigerator cooling fan

I was going to post this as a project but didn't get around to it yet. This assembly just sits on the reefer roof vent and the vent cover screws down over it. It's made with three 12-volt computer fans and a polystyrene cutting board. The fans are 120mm. You can size the amp rating of the fans as you desire, keeping in mind how much battery drain you want to tolerate. Run the wires down to the circuit board.





Add one of these to turn the fans on and off according to the temps that you set




I didn't take any scientific measurements but can tell you that my reefer now passes the ice cream test with flying colors. My feeble hands were overcome and I had to ask my wife to scoop it out for me.

I installed a laptop cooling fan just below the top vent cover, wired into the dc terminal in the outside panel . I then intalled a lit toggle switch just above the frig inside. Quiet, can't here it, and compartment thermometer confirms it lowers cavity temperature on a hot day.

Better directed airflow when fan install near top

Fan PULLS cooler air in via bottom vent cover up thru absorber tubes then across condenser fins and hotter air exhausted out top vent

12V DC available at fridge DC terminal block/circuit board
Can use a t-stat to start/top fans or manual on/off switch
Use a 1A in line fuse on DC POS wire

Just came back from the Texas gulf coast a few weeks ago and had the same problem with the fridge and high outside temps. I purchased a blower fan and installed it in the lower outside fridge access area. Connected it to the 12v supply line and used Velcro to attach it. When I checked the top vent outside, I could feel the air flow but I have not been camping again, so I don't know if this will be enough. The fan is 75mm x 30mm 7530 12V Dual Ball Bearing DC Brushless Cooling Blower Fan AV-F7530MB UL CE and I bought it on Amazon for about $9. According to all that I have read, if you can feel the air flow at the top, then it should lower the temp inside the fridge.

Check your favorite online retailer for a 120x120x25mm DC fan.

Noctua are a very reliable brand, you can get an industrial model that is sealed against dust and water intrusion. However any brand should work.

I recommend avoiding those that advertise as ultra quiet, they move very little air.

You can put it anywhere so long as it's either sucking the air through (if at the top) or blowing the air (if at the bottom). Computer muffin fans are the logical choice. Quiet and inexpensive with low amp draw.