Mine did the same thing. I'm pretty sure it's the extra fan that got added around 2011. The darn thing cycles on and off continuously due to the poor placement of the heat sensor. The fan cuts on and cools the sensor, then goes off, senses the heat and comes on again. I noticed mine kept cycling after I turned off the fridge. It continued until the fridge had completely cooled off after being off for a while. It must function independently of the cooling part. There's an entire thread discussion on this annoying fan, but I don't have a bookmark to that particular thread.
2011 Rockwood Mini Lite 2304
2004 GMC Savana 2500
2013 Days Camped, since April: 33