A garbage disposal unit (also known as a garbage disposal, waste disposal unit, garbage disposer, or in Canadian English a garburator) is a device, usually electrically powered, installed under a kitchen sink between the sink's drain and the trap. The disposal unit shreds food waste into pieces small enough—generally less than 2 mm (0.079 in)—to pass through plumbing.[1]
You should first find out whether only the disposal is broken, or if the power has gone out completely in the areas near your kitchen sink. Try resetting the circuit breaker that leads to the kitchen, or replacing a fuse if you have an older electrical box. If the garbage disposal makes no noises at all when you flip the switch, you might also want to check under the sink to see that it’s plugged in.

If the garbage disposal won't turn on but the motor makes a humming sound when you flip the switch, it indicates that the inner flywheel is jammed. Usually, this causes the appliance's reset button to pop or the circuit breaker to trip very quickly. This is not a situation you want to continue for very long, as it can burn out the disposer's motor unless the reset button or circuit breaker shuts things off. 
This new one some how makes it quiet when using the disposal. I have no idea how old the other one was, it was here when we moved in. It was flimsy and would let dirty water come up. Cleaning the splash guard and the drain it went into didn't help at all. The new is firm and sits in the drain level. My daughter was putting the old one slanted some to keep it in there. After 2 1/2 years it was falling apart. I wish I'd bought one when we first moved in. This is the first garbage disposal for me but now I've learned what to expect from it. I recommend this product and will buy another if I'm still here when this one starts to get flimsy!

Make sure that there is power getting to the unit. Garbage disposals have an independent cord that is plugged into a wall socket beneath the sink. Unplug the disposal unit and plug another small appliance, like a desk fan, into the wall socket. Turn the appliance on to see if it works. If it doesn't work, check the breaker panel. If the breaker is flipped to the "On" position, there is an electrical problem on that circuit, and an electrician must be called in.

If your garbage disposal just won’t turn at all, then it’s very likely that the disposal has lost power. Your unit may have blown a circuit, or it could be unplugged. First, check the plug for your garbage disposal to ensure that it’s secure. Next, locate the reset button on the underside of the unit, and push it. If neither of these things fixes the problem, look inside your electrical panel for signs of a tripped circuit.

Garbage Disposal Repair or Replacement

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