The guys over at PS3 Vault put the PS3 through some serious tests.

Each testing environment lasted 108 hours of use ranging from PS3 games to Blu-ray movies.

Environment 1 Typical Family Room
Temperature 73 F

Environment 2 Back of a Freezer Van
Starting at 50F and slowly went to 0F over the next 4 days

Environment 3 Heat Sauna
Starting temperature was 100F and Gradually increased to 120F over the last 24hours.

And the result?
Passed!

I’ve put the PS3 through some testing myself when Folding@Home came out, I ran it straight for 3 full weeks, I did play games from time to time, but I always switched it back to Folding@Home after. And it never had a problem! Very impressive.

Check out the link for all the details.
How to kill a PS3 Console – Is it really possible ?