The pump might need to either be replaced in your washing machine or the pump could be clogged. To check the pump you will have to first disconnect the drain line and then remove the back panel on your washing machine and use a flashlight.
You need a service call. This is a fault with the Start Capacitor Motor Control Board, or the main control board. These machines have a computer controlled variable speed motor. Everything should be silent when it is switched off, so this leads me to believe it is a board issue.
For some of the Whirlpool washing machines to turn off the the signals press and hold the signal cycle for about a few seconds to turn it off and for other models touch and then hold the steam clean option for about 3 seconds to turn off the tone.
Your washing machine might not be evenly balanced so it is shaking very roughly when the spin cycle is running.Redistributing the load will most of the time fix this problem here if it is caused by having too many clothes on one side of your washing machine.
a magnet won't work unless you necklace was made of steel and that is very unlikely. Magnets only work on Ferrous metals, so gold, silver, brass, copper or any plated items won't stick.
The necklace in there somewhere. Under the base is the pump and that is connected to a flexible pipe from the base of the drum. Pull the machine out and look at the rear. The pump is easily accessible, plus they have a filter. Videos in the link. The better search query would be 'make model remove pump'.
https://www.google.com/search?q=top+loader+whirlpool+remove+pump+filter
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If you mean the impeller is jammed then take the filter out and clean the debris that is jamming it up.
Normally the water flow when draining the machine is enough to clean it.
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