There is no thermal shutdown as such; we reserve the right to add one though (the hardware is there).

The HDDs do have their own protection and will shut themselves down if it gets so hot they start having serious problems.

If your mounting does expose the player to more heat than usual (eg, in direct sunlight on your boat, etc) then a fan is probably a good idea, mounted directly above the fan holes on the unit ideally (sucking out from the case).

Hugo