Don't play your PS3 for over 5 hours straight is my only suggestion. They are boilers once they are on for over 1, my dad's little infrared camera (its fun) registered the heat coming out at over 50 degrees.
Same problem happened to me, I have a new PS3 now
inb4xbox360isbetter
Well...
inb4wiiisforlittlegirls
What happend when you turned it back on? Did it work fine?
I was just playing for quite some time, no problem.
Umm I hope you don't mean Fahrenheit because if it is that's pretty cold.