My experience with computer type dual fin mounted fans is inconclusive. I have had two mounted since last fall. In low humidity weather, they seem to be reasonably effective. We have just returned from two months on the road in humid weather and I had problems with moisture condensing and freezing on right side fins and on the thermistor. This resulted in the fridge control circuits thinking the temperature was fine hence the fridge would not run and the inside temperature increased to 40-45 when it should have been about 36. Turning off the fan and getting rid of the ice restored operation to normal and the temp to 36. I still have them installed and will continue to use them occasionally. Has anyone else had a similar experience with fans and fin icing??