The answer to 'garbage disposal constantly running' is that the disposal is likely jammed or clogged, causing it to run continuously. This can be due to a buildup of food waste, an object stuck in the blades, or a problem with the disposal's motor or switch.
Some common symptoms of a constantly running garbage disposal include a humming or buzzing sound, the disposal not turning off when the switch is flipped, and the disposal running even when no food is being put in. To troubleshoot and fix the issue, you can try resetting the disposal, clearing any clogs, or checking the wiring and switch. If the problem persists, it's best to call a professional plumber to diagnose and repair the disposal.