Our 1HP Kitchenaid batch disposal does not turn off when the metal plug is removed. It runs for several minutes on it's own.

Following link has disposal manuals, and general installation steps and tips for most brands including KitchenAid
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html

Gene

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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Dont install auto start disposals
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html

Gene
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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Use broomstick and see if you can rotate cutter disc
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html

gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Replace disposal
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html

gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Parts are available at many sources
Copy following link to repair parts, troubleshoot and replace disposal:
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html
Add a comment as needed, or repost question with detail

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html

Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Check switch. replace switch. If switch checks out, then replace disposal to avoid risk of overheating and in-wall short.
Copy following link to repair, troubleshoot and replace disposal:
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html
Add a comment as needed, or repost question with detail

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Turn off circuit breaker, and replace switch
Copy following link to repair, troubleshoot and replace disposal:
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html
Add a comment as needed, or repost question with detail

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Remove P-trap and clean tubular drain and p-trap
Copy following link to repair, troubleshoot and replace disposal:
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html
Add a comment as needed, or repost question with detail

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Here is the manual for that model. See the troubleshooting section
http://www.manualslib.com/manual/287637/Kitchenaid-Kbds100t.html#manual