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.
Loosen the nut securing the rest of the assembly. Just below the sink flange where the drain empties into the garbage disposal you’ll see a circular plastic piece similar in appearance to the mounting ring. Insert the tip of a screwdriver into one of the lugs on this piece and rotate it in a counterclockwise direction. Pull the nut away and set it aside.
Make sure the reset button on the bottom is not popped out. If your disposal has a cord, make sure it is plugged in and there is power to the disposal. If your disposal has a cord, and there is no power to the disposal, check the breaker or GFI on the wall. If your disposer is hard wired into the wall, check the circuit breaker behind the electrical panel. If humming it is probably jammed. Use the small wrench that can with your disposal to unjam it and stop it from humming.
With so many different models of garbage disposals to choose from, it can be difficult to figure out which one will best suit your needs, especially when you begin looking at all of the different features each model has to offer. Reading garbage disposal reviews will be much easier if you know what you are looking for. Here is a glossary of common features found on most modern garbage disposals:
Jarred Connections: Considering the garbage-disposal systems is located under the kitchen sink, and since the area under the kitchen sink is a common place for storing all sorts of things, it is fairly common for the unit to get bumped.If it gets hit hard enough, the unit can actually shift so that it is no longer sitting straight. Pipes can also get knocked around, causing the seals to lose effectiveness.
Another common cause for a leaking garbage disposal is the disposal flange. A leak at the very most upper area of the garbage disposal could be the garbage disposal flange which goes through the sink. A garbage disposal flange should be sealed with Plumber’s putty and then tightened from underneath the sink. If this is not tight enough or if it has managed to come loose (which can happen) then the garbage disposal will have to be taken down so the flange can be resealed and then the garbage disposal can be rehung.