Question about KitchenAid KSM90 Ultra Power Series Stand Mixer

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Unit wont come on.. tried several power outlets .. I checked the brushes.. they look fine.

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First disconnect the power, and remove the carbon brushes again. They will only go in one way and if incorrectly placed inside the unit, the mixer will not operate even if you fix the problem. If the brushes are correctly placed inside the mixer then this problem will most likely be caused by the main control board. You can check this visually by removing the back panel with the power removed. Once you remove this you can see the main board, visually inspect it for any burn marks and also smelling for ant burned wires can prove useful. Part number for the main control is W10119326. Hope this helps.

Thanks

Posted on Nov 22, 2009

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1 Answer

My KitchenAid KSM90 will not turn on at all.


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: http://www.mendingshed.com/mixercord2.html
Here is a link to the brushes: http://www.mendingshed.com/kitchenaidbrushes.html
Here is a link to the speed control plate: http://www.mendingshed.com/speedcontrol.html
And here is a link to the service manual for your mixer, it has more troubleshooting ideas on the last few pages: http://lib.store.yahoo.net/lib/mendingshed/kitchenaidservicemanual.pdf

Thank you,

Colleen
Customer Service
MendingShed.com
customerservice@mendingshed.com
800-339-9297

Apr 13, 2013 | KitchenAid KSM90 Ultra Power Series Stand...

Tip

How to repair a KitchenAid mixer.


If your KichenAid mixer doesn't seem to have the power it once had try the following repair procedure.

More than likely the armature needs to be cleaned if you have made sure that the brushes are OK. The brushes are acceptable if they have 1/4 inch of carbon left. Disassembly of the unit is not that difficult.

First remove the screws holding in the brushes and remove the brushes. Make a note of which direction the 45 degree off set faces or you will have to dissable the entire unit to get the brushes in properly. Remove two screws from the rear of the unit holding the cover between the two halves of the unit (top and bottom). You will need to remove all the screws on the underside of the unit. Approximately 6.

The shaft located vertically has a pin in it which needs to be driven out with a punch/hammer. Then a "C" clip must be removed form the shaft to remove it. If you do not have a "C" clip pliers you can get them at most automotive parts distributors.

Next pry the bezel off around the exterior of the shaft which will expose about 6 screws which need to be taken out. Now you can remove the head assembly as well as the top of the unit exposing the motor armature. When reassembling this drive unit use some Loctite on the threads of the screws to prevent them backing out. This is a common problem with these units.

At this point you should be able to see how burnt the armature is. Using crocus cloth (very fine emery cloth) available at any home improvement store such as Lowes or Home Depot, clean the armature until it shines.

Clean the armature with a solvent to get rid of any filings or debris that was left from the cleaning process and wipe the entire unit clean.

Reassemble the unit and it should be as good as new. Remember to insert the brushes the proper way or the unit will not work. They are keyed.

Thanks for using FixYa and for the great rating.

hardrocko

on Nov 30, 2010 | Food Mixers

1 Answer

Kitchenaid wont turn on


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.

Jan 31, 2013 | KitchenAid KSM90 Ultra Power Series Stand...

1 Answer

Checked brushes and now it doesn't work


I am fairly sure you have put the brushes back in the wrong way round. Shine a torch into the hole and you will see it has a small square "key". Ensure this lines up with the chamfer on the brush and you should be fine.
Rgds,
Doug

Jan 23, 2012 | KitchenAid KSM5PS Heavy Duty Stand Mixer

1 Answer

No power after replacing worm gear in Kitchenaid KSM90 Mixer


Remove the rear cap from the unit. Power comes in from the black wire with the white being common. Hold a voltmeter lead on the white and check for power on the black. Power goes across the bottom of the speed control unit via a buss bar. Check for power on the right side, I think it is a red wire (may be a white one). Power is taken into the motor via that wire, goes thru the windings and the brushes and then out the other brush wire and back to the board. Check for power on the return wire. If it is dead then either the windings in the motor are burned out or one of the brushes is dirty and needs to be cleaned and reseated prpperly [note there is one and only one way the brush goes in!!!! Install it incorrectly and the brush will not touch the commutator.

Try that and see if it runs after cleaning the brushes.

Mar 31, 2010 | KitchenAid Food Mixers

1 Answer

We purchased a KitchenAid Plus 275 in 2006. Used it once then packed it for storage since we moved several times. Tried to use it today, will no turn on.


The easiest thing to check is the brushes. There are two large "buttons" on the sides of the mixer. They have a large slot in them. You can use a quarter to stick in the slot and turn the button counterclockwise. Once removed you will see a spring sticking out. Now this is important. On the other end of the spring is a small carbon bar (the brush) which is square and about half an inch long. Note that there is one corner of the carbon bar, the brush, which is removed forming a flat on that corner. Note the position of the flat so that you can replace the brush in the same position. If you don't then the brush will not contact the armature and the unit will never run!

Once removed examine the end of the brush to see if there is some crud on it, most likely charred flour. Carefully scrape the crud off the brush and re-insert it remembering the above . . .make sure it slides easily into position. If it is sticky then remove it again and clean out the brass hole with a q-tip.

Do this to both brushes and the unit will most likely run.

Of course make sure the outlet you are using has power to it!!

If it still doesn't run then there is a problem with the phase control board or the motor.

Mar 28, 2010 | KitchenAid K45SS Classic Stand Mixer

1 Answer

I have an Epicurean KitchenAid Mixer. It does not


The easiest thing to check is the brushes. There are two large "buttons" on the sides of the mixer. They have a large slot in them. You can use a quarter to stick in the slot and turn the button counterclockwise. Once removed you will see a spring sticking out. Now this is important. On the other end of the spring is a small carbon bar (the brush) which is square and about half an inch long. Note that there is one corner of the carbon bar, the brush, which is removed forming a flat on that corner. Note the position of the flat so that you can replace the brush in the same position. If you don't then the brush will not contact the armature and the unit will never run!

Once removed examine the end of the brush to see if there is some crud on it, most likely charred flour. Carefully scrape the crud off the brush and re-insert it remembering the above . . .make sure it slides easily into position. If it is sticky then remove it again and clean out the brass hole with a q-tip.

Do this to both brushes and the unit will most likely run.



Of course make sure the outlet you are using has power to it!!

If it still doesn't run then there is a problem with the motor control board or the motor.

Mar 28, 2010 | KitchenAid KT2651X Epicurean Stand Mixer

1 Answer

Worked fine, then didn't- getting power


The easiest thing to check is the brushes. There are two large "buttons" on the sides of the mixer. They have a large slot in them. You can use a quarter to stick in the slot and turn the button counterclockwise. Once removed you will see a spring sticking out. Now this is important. On the other end of the spring is a small carbon bar (the brush) which is square and about half an inch long. Note that there is one corner of the carbon bar, the brush, which is removed forming a flat on that corner. Note the position of the flat so that you can replace the brush in the same position. If you don't then the brush will not contact the armature and the unit will never run!

Once removed examine the end of the brush to see if there is some crud on it, most likely charred flour. Carefully scrape the crud off the brush and re-insert it remembering the above . . .make sure it slides easily into position. If it is sticky then remove it again and clean out the brass hole with a q-tip.

Do this to both brushes and the unit will most likely run.

Of course make sure the outlet you are using has power to it!

If it still doesn't run then there is a problem with the control board or the motor.

Mar 27, 2010 | Food Mixers

1 Answer

Just stopped working, likemit was not plugged in.


The easiest thing to check is the brushes. There are two large "buttons" on the sides of the mixer. They have a large slot in them. You can use a quarter to stick in the slot and turn the button counterclockwise. Once removed you will see a spring sticking out. Now this is important. On the other end of the spring is a small carbon bar (the brush) which is square and about half an inch long. Note that there is one corner of the carbon bar, the brush, which is removed forming a flat on that corner. Note the position of the flat so that you can replace the brush in the same position. If you don't then the brush will not contact the armature and the unit will never run!

Once removed examine the end of the brush to see if there is some crud on it, most likely charred flour. Carefully scrape the crud off the brush and re-insert it remembering the above . . .make sure it slides easily into position. If it is sticky then remove it again and clean out the brass hole with a q-tip.

Do this to both brushes and the unit will most likely run.

Of course make sure the outlet you are using has power to it!

If it still doesn't run then there is a problem with the control board or the motor.

Mar 23, 2010 | KitchenAid KSM150PSAC Hand/Stand Mixer

1 Answer

Wife removed rear cover, blew out dust, brushed lightly with toothbrush. Also removed round black cover on side releasing a spring and cam but seems to be put back correctly. When plugged into power outlet...


There may be a few solutions to you problem. it could be that the carbon brushes located at the left and right of the unit are either gone or improperly seated, as they will only work one way. part number for the brushes is 9706416 after checking these and if they are okay. i would check the board to see if there was any bending atall during the cleaning. there is a metal arm that the white actuator slides into on your board. if this metal arm has been bent even by a 1/4 inch or more it wont make contact and your unit will not operate.hope this helps

Thanks

Oct 04, 2009 | KitchenAid K45SS Classic Stand Mixer

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