I have experienced this with my 2016 NV 3500 passenger van as well. It was really awkward how it all started since my wife and I drove the van a little over 300 miles to Laughlin and another 300 miles to go back home (weather in Laughlin peaked above 120 degrees while on vacation). We bought the van with only 12 miles on the odometer from the dealer. We took several more trips and added an additional 3000 miles to the vehicle. The issue did not start till recently when temperatures reached 100 degrees here in Southern California. The noise would come on when the AC was on. The noise was of a lot of concern since I did not want the van to over heat or have the fan clutch break while driving. Hated that the fan would stay on at highway speeds and how it would turn off for only a few seconds and then immediately turn on again. I found the only way to prevent the condenser fan from staying on was to make sure the AC was off before we started the van and to make sure it was off before turning the van off. Since it is getting colder here, I have not had to use the AC and have not experienced the issue since. Hopefully NIssan finds a fix before next Summer.
