Question about KitchenAid KSM103 Professional 5 Series Stand Mixer

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Kitchen Aid Stand Mixer (model 4KSM90OB) won't run.

For Mother's Day I am finally getting around to looking at why my wife's Kitchen Aid Stand Mixer (model 4KSM90OB) won't run.

I believe that it is the Phase Board (part no. 9706595). Is there any way to confirm that this is the part that is faulty? I downloaded a copy of the service manual which lists the or Control Plate (part no. W10119326) as another possible culprit. Based on the schematic for the Control Plate it appears that all connections are good with the red, white/red, and blue wires all carrying 120V to the phase board, but nothing coming back out the black wire.

If I use a piece of wire to jump the blue to the black the motor runs, with the lever correctly controlling the speed (I stumbled upon this by accident).

Thanks.

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  • KitchenAid Master
  • 1,221 Answers

Sounds like you have solved it already, the phase boards are worth stuff all so buy one and throw it in. It's unlikely to be much else as you have proved the motor runs.

Posted on Mar 24, 2017

4 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: mixer speed settings

It could be the phase control, or it could be that the governor assembly or associated spring is missing or malfunctioning.

Posted on Mar 25, 2008

hslincoln
  • 235 Answers

SOURCE: kitchen aid mixer model K45ss motor just quit

Hi LCHESNEY, it sounds like you’ve got the mixer apart already to do your voltage checks. So my guess it that you’ve already determined that that (speed) Control Plate Assembly is not good and need to be replaced. Since you’ve already disassembled your mixer once I hope you have your mixer’s Parts List manual on hand, but if not, you can download a PDF version from the KA website: http://www.kitchenaid.com/flash.cmd?/#/page/home.
Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, in your case use K45SSW, and select the file listed under Parts List (1), K45SSWH0.pdf (341.41 KB). Check to ensure it matches your mixer model.
Turn to pages 6 & 7, titled: Motor And Control Parts, which provides an exploded view for the disassembly and reassembly of your mixer’s electrical components, along with all the parts. Find Illus. No. 25, Control Plate Assembly, Part No. 240904-2.
As far as parts go, here are four potential vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com. Prices for the same part can vary widely between vendors, so do your comparison shopping.
Here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer.

Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able replace your Control Plate Assembly.
Good luck and have fun. I hope this helps. Howard, Burke, VA
If this solution has helped you, please rate it, thanks! - hslincoln

Posted on Dec 22, 2009

  • 153 Answers

SOURCE: I could not regulate the

The K5SS is very similar to the 5-QT Artisan KSM150.
You need to adjust the mixer speeds. Obtain a copy of the K5SS Repair Part List from Kitchenaid.com. Remove the screw holding the End Cover and locate the three screws from the Control Plate. All three (2 top left and right, and 1 bottom) must all be adjusted. 1. Loosen the lock nuts enough & Turn the 2 top screws clockwise until they cannot be turned
anymore. Leave the bottom screw alone for now.
2. Use a dab of white paint or paper whiteout to mark the positions of the Phillips screws.
3. Plug in your mixer and Set the speed selector to "Stir".
4. Turn each top screw One full turn couterclockwise (alternating between Left and Right)
Keep making one full turn at the time (for both left and right) until the motor starts running.
5. Put your hand near the Agitator shaft and allow it to brush your finger slightly. Use your
watch or clock and start counting the number of times the shaft touches your finger in
60 seconds. The correct count should be 60 RPM (Rounds Per Minute). If it is less
or more than 60, give each screw 1/4 turn counterclockwise or clockwise and start counting
again. Now tighten both lock nuts.
6. Set the speed selector to "6" and turn the bottom screw either clockwise or counterclockwise
to achieve a speed of 180 RPM.

For your reference, the planetary RPM's for the 5-qt. tilt-head Artisan Stand Mixer are as follows:
Stir speed - 60
Speed 2 - 95
Speed 4 - 135
Speed 6 - 180
Speed 8 - 225
Speed 10 - 280


Posted on Jul 04, 2011

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