The answer to 'garbage disposal frozen' is that a frozen garbage disposal is a common problem caused by food, ice, or other debris getting stuck and preventing the disposal blades from turning. Symptoms include the disposal making a humming noise when turned on, but not spinning. The solution is to carefully unfreeze the disposal by turning it off, accessing the reset button, and manually turning the blades to free up the blockage.
If the disposal remains frozen or won't reset, it's best to call a professional plumber. They can safely disassemble and clear the disposal to get it working again. Attempting to forcefully unfreeze a frozen disposal can damage the unit and potentially cause injury.