Stand mixer doesn't work after the 5th speed

SOURCE: Kitchenaid K5A mixer 10 speed only runs on fast, no slow speed

Pull the back off and there will be two screws at the top of the Speed Control Plate and a 3rd screw at the bottom. Tighten the top two screws down. [email protected]. Let me know if it works.

SOURCE: 575 watt 6qt stand mixer. start out on low speed

Hi. If your mixer is still under warranty, call Kitchenaid, they are usually very good at replacing mixers under warranty.

If you're out of warranty, you'll need to order a new speed control board. Use the following link to download the parts catalog for your mixer.

http://shared.whirlpoolcorp.com/assets/pdfs/literature/Repair%20Part%20List%20-%208212278.pdf

You can remove and replace this board yourself. Use the drawings to assist you with the project.

If this solution has assisted you, please rate it. Good luck! ricardok45

SOURCE: I just received my new Kitchenaid Stand Mixer.

Hi, LeeWhay, sorry to hear that your having problems with your new KA mixer. Since it is under warranty, contact them immediately and tell them about your problem with the stir speed not working. The KA website is at: http://www.kitchenaid.com/flash.cmd?/#/page/home. Click on Customer Care>Contact Us> and the toll free phone number is listed to speak with someone. You can also look under the Warranty & Service Plans to see what KA will do for you. I've extracted parts of it here:
Hassle-Free Replacement Warranty
We’re so confident the quality of our products meets the exacting standards of KitchenAid that, if your mixer should fail within the first year of ownership, KitchenAid will arrange to deliver an identical or comparable replacement to your door free of charge and arrange to have your “failed” mixer returned to us.
Your replacement unit will also be covered by our one year full warranty. Please follow these instructions to receive this quality service.
If you reside in the United States and your KitchenAid® mixer should fail within the first year of ownership, simply call our toll-free Customer Satisfaction Center at 1-800-541-6390, 8 a.m. to 8 p.m.,
Monday through Friday, 10 a.m. to 5 p.m., Saturday, Eastern Time. Give the consultant your complete shipping address. (No P.O. Box Numbers, please.)
When you receive your replacement mixer, use the carton and packing
materials to pack-up your “failed” mixer. In the carton, include your
name and address on a sheet of paper along with a copy of the proof
of purchase (register receipt, credit card charge slip, etc.).

I hope this helps. Good Luck with KA! - Howard, Burke, VA
If this solution has been helpful, please rate it, thanks! - hslincoln

SOURCE: Kitchenaid stand mixer runs only on slow speed

The Kiichenaid mixer has a centrifugal speed governor. I suspect your is stuck. It will need to be disassembled, and inspected.

SOURCE: mixer doesn't work on all speeds

First the K45SS does not have a hall effect sensor. the pro series the epicurean seines and the pro series 5 use them, The K45ss system uses a phase control board a speed control plate and a governor for speed control. the governor rarely goes out the phase control board is a likely culprit but the system would work only in high gear if it was bad. I agree with the guest above in that it sounds like the retaining nuts on the adjusting screws of the speed control board have worked themselves loose and the adjustment screws themselves have vibrated out of proper position.