Oddly, the N3000 series installation manual
does not even mention the circulation fan. From reading the Norcold installation manual for other models, this fan should be mounted at the top of the cooling coil (it should be approx. where item 19 is shown on the drawing on page 19. This exhausts hot air and draws cooler air in through the bottom vent.
Compare your frig installation to the manual. I've found 2 of mine (in different RVs) were installed incorrectly and consequently did not cool properly. One was missing a baffle to direct hot air upward properly, and one had insufficient clearance for the side-wall upper vent.
Many people are buying the ARP unit, and are happy with it's performance. Do a little research on the internet and you'll find enough information to decide if it will satisfy you need.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"