Before I start, I just want to share the links to the other posts on Elsas body temperature and my theories.
Check out part 2:
https://www.reddit.com/r/Frozen/comments/1uttmum/an_extension_to_elsas_body_temperature_its_effect/
Check out part 1:
https://www.reddit.com/r/Frozen/comments/1u5yol6/elsas_body_temperature_is_warmer_than_a_normal/
Sorry I ended up flipping them out of order of 1, 2, etc.
Anyways lets figure out what would happen if Elsa ever lost her powers:
If Elsa were to lose her powers in such a scenario right out of Polar Nights, it would be a wild scene but what about her body temperature?
The simple answer is that her body temperature wouldn't drop or change all of the sudden if she were to lose her powers. As I estimated in my first post Elsa would run a bit warmer at 99.5 degrees farenhieght. Which I explained how she isn't bothered by cold places, her own magic, and wears thin clothing for a majority of time across the shorts and movies. So in the event that Elsa were to lose her magic while still living and not frozen to death, I think the points that need to be addressed are:
A. Elsa would still retain a warmer body temperature which it wouldn't be a huge change at all, I think she would still retain her 99.5 degrees farenhieght core whether her losing her powers were permanent or temporary.
B. Elsa would lose her immunity to the cold meaning instead of her feeling the cold as refreshing and having the air conditioning effect where the cold if refreshing and cool, Elsa would feel the cold the exact same way Anna and Kristoff would or like any other completely normal human being. Elsa would feel the cold as chilly and even freezing. So yes she would feel the cold in a normal way.
So the short answer is that if Elsa were to ever lose her powers it wouldn't be that much of a shock or even a significant change but rather her becoming even more human like than she already is.
What do you think of this little extension analysis on Elsas body temperature and her magical powers? Feel free to add on and share your thoughts.