Wow!! Just swapped out the 12 volt Computer fans with the new/updated 110 Volt Fans, and now my 1502 is so quite I can barely hear it running. The 12 volt fans have a plastic housing while the new 110 volt fans have a metal housing, much more beefier. I'm not sure when GQF made this upgrade to the 110 volt fans, obviously they cut corners with the 12 volt fans and mine started failing only after two years of use. Lots of goings on down at the Quail farm, I wish they would keep their customers up to date on issues. I had over 5 dozen eggs in my 1502 and if I lost my fans completely these eggs would have suffered. I could have easily swapped these fans out last winter when the 1502 wasn't in use, but now I had to drop more dollars for the complete fan/heater assembly so I could make the swap quicker with eggs in the incubator. I definitely have some spare parts now
Just a heads up to anyone that bought a new 1502, mine was purchased in April 2013.
You can check the rating on you fans by looking at the front of the fans, also the 12 volt fans are plugged into a 110v > 12v converter which is no longer needed for the 110 volt upgrade.