i deployed my fan this fall and found a 10 or 15 degree drop in tempature. I ended up with a fridge that was near freezing if the door wasn't opened very often. you may find that there is a greater change in the summer months or longer trial.
not sure what time period you used to quantify that one degree drop. you have to give it time to work, just as you have to give the fridge plenty of time to cool. you might be misunderstanding the purpose of the fan. it is meant to limit the buildup of frost on the fins by circulating air inside the fridge. in doing that i think it makes the fridge more efficient.
i mounted my fan toward the top of the fridge, clipping the ground clip to the very top of the fins and using a little 29 cent home depot clip clipped to the fin below the fan base to hold it in place.
Originally Posted by MacDaddy
I bought the one from ebay. Looked like a simple, well thought out unit. Tried it in my fridge and it dropped the temp only 1 degree.
Waste of money for me!!