In Escondido's older kitchens, the disposal is often the newest thing under the sink, connected to plumbing that's decades older, so when it quits, the contractor looks at both the unit and the drain. The unit is the place to start, because disposal failures usually fall into 3 clear types. A hum without spin is usually a jam, common and fixable. A leak below is often seals or housing, case by case. Silence usually points to the electrical side or the motor, and a worn out motor usually means a new unit.
Jams happen the same way everywhere, when something fibrous or hard locks the impellers during cleanup and the motor hums without turning, which leaves the kitchen hard to use. The contractor clears it with the right tool and checks whether the jam damaged anything inside. Leaks call for more caution here than in most places, because a slow drip into an older Escondido cabinet can go on for weeks before anyone notices, and the older cabinets take the damage first.
When replacement is the answer, you'll hear that plainly, and the install takes both the unit and the drain into account, with the new unit sized to how the kitchen is really used and the connections to the older drain lines done properly. If the contractor sees early signs of trouble on the drain side during the work, such as slow flow or buildup, you'll be told about it in plain terms. Everything is explained clearly, and you decide what happens next.