Top 20 KitchenAid KSM90 Ultra Power Series Stand Mixer - Page 2 Questions & Answers

Check for broken wire under back cover, check carbon brushed under black screw covers on sides. The brushes are keyed and only work one way.

KitchenAid KSM90... | 76 views | 0 helpful votes

Check the carbon brushes under the black screw caps on the sides.

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I am sorry to hear you are having issues with your appliance. I have added a link below for our help video on setting the correct speed on your mixer:

I hope this helps you with the issue with your mixer :)

KitchenAid KSM90... | 40 views | 0 helpful votes

You need to tell us what the problem is if you are expecting some help.

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I don't have one here in front of me but the wire colours are all written on the speed control plate, have a good look at the plate near the terminals.

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Remove the power and undo the brush caps on the side of the motor and check the brushes. They only go in one way, one corner is chamfered off and must be lined up with the little blocking lug inside the bottom of the brush holder. You may need a torch to look in there. I'm not so sure that this will be the solution but well worth a look.

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There is no overload switch / button on a KSM90 mixer. Please explain further

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Did you remove the carbon brushes. If so they go back in any of four ways. But only one way works correctly. If you did not remove the brushes then you need to set the speed timing on the speed control switch at the rear of the machine and you can find a YouTube video on this exact exercise on YouTube of course. You may have also reattached the wires to the speed control switch to the wrong connectors hence no work.

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The switch on the inner side of the black speed control board may have become bent with your repair efforts and the contacts may no longer be touching. One part of the switch contacts is lifted and lowered by the speed link that you put back to its correct position.

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How old, what model number and witch switch speed or head lock.

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First make sure that the mixer is plugged into a working outlet. Were there any symptoms the last time you used your mixer? Check the cord on the mixer for damage. If the cord shows any wear replace it immediately.

At any point in time have you removed the brushes or adjust the speed control plate? After checking the cord, remove the brushes from the mixer, check to see if they are pitted, if they are replace the brushes. Please pay extra attention when putting the brushes back in the mixer, there is a dog-eared side of the brush, match this up to the brush holder to make sure the brush is inserted correctly.

If the brushes are not the problem check the speed control plate. If you remove the end cover from the mixer you can gain direct access to the speed control plate. There are 3 screws on this plate, the top two are used to adjust the speed of the mixer, the bottom one spaces the on/off switch contact. Try adjust the bottom screw to see if the mixer will turn on, it is possible the on/off switch was out of place.

Try these first, if none of this works let me know and we can continue trouble shooting.

Here is a link to the cord for your mixer:
Here is a link to the brushes:
Here is a link to the speed control plate:
And here is a link to the service manual for your mixer, it has more troubleshooting ideas on the last few pages:

Thank you,

Customer Service

KitchenAid KSM90... | 206 views | 0 helpful votes

It sounds like your mixer has a bad ground connection. Sorry electrical is not my forte, but something in the mixer wiring is the problem, not the wall outlet..

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Do you have a manual? You can download one from Kitchen Aid, small appliances. There should be a schematic and how to that will help.

KitchenAid KSM90... | 352 views | 1 helpful votes

Not near enough info to solve this one. What happened last time you used it, have you checked the wall outlet (yes I know but still check it) next it could be your power cord for the mixer, next it could be the speed control board and adjusting screws have vibrated out of position. or several more deeper problems. be glad to help but we need more info.

KitchenAid KSM90... | 81 views | 0 helpful votes

the problem may be that the machine has grease in the gear set that is sperating. this usually happens when the mixer is not used for long periods of time or The mixer has been heated up and has seperated the grease. Not to worry you can find grease fromkitchen aid parts stores for the right grease. The disassembly procedure is a little tougher though. go on you tube and look up The videos they have on kitchenaid mixers cover alot of the problems these mixers have. If you have the time you can save a ton of money by regreasing the mixer yourself.

KitchenAid KSM90... | 32 views | 0 helpful votes

Wipe the oil off and carry on. Over time the gearbox grease breaks down and oil separates from the grease solids. Eventually the gearbox will need to be repacked with new grease. Don't worry about a drip or two in a cake, it's food grade grease so harmless.

KitchenAid KSM90... | 129 views | 0 helpful votes

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