My son's ceiling fan metal casing is very hot.

The ceiling fan in my son's room is very hot. It's been installed and working for close to a year

Most electric motors get pretty hot when running for long periods. When you say very hot we have no way to tell if it is absnormally hot. No smoke, fan runs, no breakers popping all signs this could be normal. Do not leave it running unattended and let us know if it ever does anything I mentioned

If the fan works fine otherwise, it is normal for the motor to be hot.