NRALIFR wrote:
The RV fridges I’ve seen with a factory installed fan inside them has been at the very top, with the air blowing towards the fins. The one I’m thinking of was in a Norcold fridge, and it looked like a centrifugal fan laying flat against the top of the reefer compartment. It was inside a plenum box that directed the air across the width of the fins.
I made one for my fridge with a small 12v fan that was in my junk pile. I used it because it’s small, and it’s the right voltage. I tapped into the power going to the interior light, and it runs full time when the fridge is turned on.

:):)
Since you are using the interior fridge light as a 12vdc power source I assume the light does not go off when the fridge door is closed?