Hi sfl_cntrl,
Yes, I forgot a very important thing.
In the screen editor you have to add the degree symbol as well. You can find more information in the user manual, search for "edit code point set".
See image.
1. When in the screen editor, click the {a} symbol in the toolbar.
2. Click the edit button, the pen.
3. Select the Degree symbol in the table, B0. You can add more symbols if you want.
4. Click OK.
5. Compile and download.
Now the code should work for you.
Sorry about this.
Good Luck