A disposal repair addresses the unit, mounting, connections, or internal operation. Drain clearing addresses material blocking the pipe. The two problems may occur together.
A jam, loose drain connection, or reset-related issue differs from a cracked housing, failed motor, or damaged internal mechanism. The source, condition, damage, housing, operation, and trouble history should guide repair or replacement.
Fixing the disposal may not clear a restriction farther down the line, and clearing the drain will not repair a cracked housing or failed motor.