Question about KitchenAid K5SS Heavy Duty Commercial Stand Mixer

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Motor made a grinding sound and stopped. Took out brushes to check. They aren't badly worn. Motor is cooled now and still won't start.

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BGL0514 - Are you sure the grinding sound was coming from the motor, or was it more likely coming from the transmission? It appears that your mixer had a mechanical failure in the transmission box or planetary gear assembly of your mixer - one of the main gears has failed, hence the loss of power to the agitator.
The inspection and troubleshooting of the transmission is a DITY capability, particularly if your mixer is out of warranty. Just be sure to have the correct Part List manual around when you start to disassemble your mixer. If you're lacking one, you can download it from the KA website. Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, and then select Parts List file. You can check the page titled 'Case, Gearing & Planetary Unit, for the disassembly, troubleshooting, and reassembly of your mixer, along with all the parts. It can be messy but gratifying. Once apart you can check for any other unseemly wear and tear on the gears, etc. Here is a link to an excellent webpage for disassembling/fixing your KA Mixer: http://www.neilcrockett.com/mixer.htm
Finally, with respect to your brushes that you removed, I'd suggest removing them again and making sure the contacts are facing in the right direction to contact the armature. The concave contact face should be resting completely on the armature. If you've turned it 90 degrees too much, it wont' seat properly and you'll get no 'juice' to the electric motor, so it won't start. I hope this helps - Howard, Burke, VA
If this solution has helped you, please rate it. hslincoln

Posted on Nov 20, 2009

Testimonial: "Thanks. Motor came on after 3 hour cool down. Still making the grinding noise. If it goes out again, I'll try the diy option."

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It sounds like you may have an issue with your motor control board. When this is faulty it can cause an irregular motor rpm or no motor what so ever. You can check this by first removing the power and then remove the back access panel. Now you can see the motor control. Visually inspect the board and smell for any burned connections. Part number for the board is W10119326. Hope this helps.

Thanks

Posted on Nov 22, 2009

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