A disposal in a beach kitchen wears out the same way as any other, except that salt air can also work on its connections and housing from the outside. When one quits in IB, the sorting runs the standard list. A hum without spin is usually a jam, common and very fixable. A leak underneath is often seals or housing, judged case by case. Silence usually points to the electrical side or the motor, and a motor that has failed usually means a new unit.
Jams are the everyday disposal problem, and they happen when something fibrous or hard locks the impellers so the motor hums but can't turn. A jam gets cleared properly with the right tool, and the visit checks what the jam left behind. The leak call carries extra weight near the water, because coastal cabinets and floors take moisture damage fast, and a slow drip from a disposal can go unnoticed until the cabinet floor is damaged. Looking under the sink every few weeks is an easy way to catch a small leak in a beach home.
When the unit is done, you get the reasons plainly and a unit matched to the kitchen's real use with the coastal environment in mind, with the connections installed properly. If the older drain lines the disposal feeds show their age during the work, you'll be told plainly. Every decision along the way stays with you.
