IMPORTANT: Whenever you are working on your garbage disposal, inserting items, and/or inserting body parts into your garbage disposal unit, it should be UNPLUGGED and the POWER TO THE GARBAGE DISPOSAL UNIT SHOULD BE OFF!  Failing to do so will put you at risk of SERIOUS INJURY.  Also, if possible avoid placing your hands directly near the blades at the disposal.  If you can, instead use a tool to wedge out items or check the blades for blockage.
At the time, the Mobro 4000 incident was widely cited by environmentalists and the media as emblematic of the solid-waste disposal crisis in the United States due to a shortage of landfill space: almost 3,000 municipal landfills had closed between 1982 and 1987.[5] It triggered much national public discussion about waste disposal, and may have been a factor in increased recycling rates in the late 1980s and after.[6] It was this that caused it to be included in an episode of Penn & Teller: Bullshit! (season 2, episode 5) in which they debunk many recycling myths.
Although the name is most famously associated with their high quality mixers, KitchenAid garbage disposals have fared well in both professional and consumer written reviews. Founded in 1919, the KitchenAid brand is the only brand in the world that produces items strictly for the kitchen. KitchenAid offers both batch feed and continuous feed garbage disposal systems for residential and commercial settings.
The bulk of a food waste disposer system, which includes the seals and pipes, is located beneath the kitchen sink. Most homeowners use this space to store various items, and it is not uncommon for people to bump or jar the disposal’s pipes when reaching for an item that is in close proximity. If the pipes are struck hard enough, the pipes can shift so that they are no longer sitting properly. Retaining bolts can become loose. Pipes may move, and seals can shift into an awkward position.
Some types of food remains are not easy to grind in a disposer. Do not put fibrous food items into your disposal. Help grind these items by putting in a few small bones or large ice cubes to the disposal. If the disposer won’t grind it up then turn off the disposer and remove the item with a pair of tongs. When using your disposer, make sure that the disposal is running with good water flow. Good water flow carries the waste down the drain line. Using too little water can create a clogged drain.
Read the directions for your model before attempting a home repair. Most disposals have an electrical reset button, and a manual hex key for un-jamming. If the disposal stops working, its internal circuit breaker may have shut it off. Turn the switch definitely off, and try to pull out the hard object that may have jammed it. Then use the right-sized hex key to manually turn the rotor parts (usually directly under the unit in the center). If it turns, then push the reset button. It usually clicks in. Then, turn on the water and try the power, again.
Release the old disposal from the mounting ring. At the top of the unit you should see a thin metal ring with 3 separate lugs, or protruding arms. Take hold of these lugs with one hand and twist the entire ring counterclockwise about 1.5 inches (3.8 cm) to dislodge the old unit. Set it aside on a sheet of newspaper or unfolded rag to keep from making a mess.[4]
Here are some problems that every garbage disposal can run into, old or new. Learning about your garbage disposal and how it works (and how it doesn’t work, of course!) is the first step to decide if it simply needs a repair or if it needs to be replaced all together. One thing that stands for any and all situations: never stick your hands down the drain!
Garbage disposals can range from $70 on the low end to $380 on the high end -- and generally speaking, you get what you pay for. A less expensive unit is likely to produce more noise, require more water, and clog more easily than a higher-end model. Likewise, a more expensive unit will be faster, quieter and less likely to malfunction than a lower end model -- and it will be lighter-weight and offer greater capacity as well. The average cost of a garbage disposal installation with a one-year manufacturer’'s warranty is $185. The average amount of time taken to install a garbage disposal, including cleanup, is three hours. The hourly cost for labor will range from $20 to $40 -- $28 on average.
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