Knowing when to repair versus replace a garbage disposal comes down to the unit's age, what's actually failing, and where the corrosion has reached. If your disposal is under about five years old and the problem is a jam, a tripped reset, or a leak at a connection we can tighten or reseal, that's a repair, and it's almost always the cheaper call. A hex-key free-up and a reset cost a fraction of a new unit and install.
When replacement is the smarter call
Replacement wins when the leak is coming from the body of the unit rather than a fitting, when the grinding chamber is cracked or rusted through, when the motor is confirmed dead with good power at the unit, or when the flange bolts have corroded to the point the disposal won't stay sealed to the sink. In the West Valley that last one is common on units past the eight-year mark, because 12-to-18-grain water eats the flange hardware from the sink side first. The line we draw is simple: if it's a jam, a reset, or a tightenable leak on a unit that's still sound, we fix it. If the corrosion has reached the housing or the motor, we replace it. We give you both the repair and the replacement number so you decide, not us.