Yes Chance, It may have been mistreated a little, not enough to do damage to the case, but mistreated just the same. The fact still remains if you search the internet for the same thing, on a model that gives you a message telling you the system has overheated, these are release models. My PS3 has always had plenty of air. It has always been treated like it was made of glass. If I had not taken such good care of it this would have happened when it was still under warranty. Do you get where I'm coming from a little bit now?
I hooked a "EAREKA" vac. to the back and it works fine. My fan barely turns so I would have to say it's the fan or whatever controlls the fan that has failed/broke. Within the next year I think the fan would have maybe died regardless. If your dog whacks the your ps3 with it's tail, it is a release model, and you have had it for more than a year. The same thing may happen to you!!