invalid UTF-8 byte sequences and iconv

Hi,

We have set up a new server and are needing to move our database from
7.3 to 8.1.4.  On restore I'm getting the 'invalid UTF-8 byte sequence'
error message.  If I use the command iconv -c -f UTF-8 -t UTF-8 -o
cleanfile.sql dumpfile.sql, then the characters are deleted and the
restore goes smoothly.  The problem is that we want those characters.
They are for example the degree symbol and the micro symbol.  Is there
anyway to bring these characters over?  Thanks in advance.

Karen