I used a temp switch, I think 80 degree, fastened to the hot flow side of the fridge unit,surface contact type held on to the cooling line by a stainless hose clamp. Switch only runs when the unit is cooling and works on either gas or elec. Also have a manual sw mounted behind the cover if I want to totally turn off. The temp sw turns on the two 4 inch electronics cooling fans mounted to the bottom of the upper coils. Pushes air across the coils and out the upper vent cover. Made a huge diff in cooling, typically run two temp settings lower than before. I have less than 60 bucks in all of it.