Please, can someone confirm ?

uses "console"

printl Console_GetCP ' Outputs 850
printl " °C " ' Outputs  ┬░C 

WaitKey
ThinBasic 1.11.6.0 ALPHA
Font is "Consolas" and has support for the characters needed.
Changing font to "Deja vu" doesn't solve the issue.
Changing codePage to 1252 or 65001 doesn't solve the issue.