There are basically two mods both are fans
I put a set of fan INSIDE the Fridge blowing on the fins. Not only improves cooling but reduces "Frosting" a well.. They are specifically designed for the fridge and attach to the fins.. need to modify it by adding one more fan but that will happen later.
Outside fan may also help but my RV service tech pointed out the fiber crud that built up on the heat exchanger in an area you can not reach) turns out I can blow it out but take a look at your air conditioner condonser coild
Coleman the outside
Most other makes the fan side (you need to remove covers
The crud offsest the effect of the fan.