Question about KitchenAid KSM90 Ultra Power Series Stand Mixer

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When the mixer is turned on, you can here the inside going, but the outside part does not turn

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Sounds like a problem we had years ago. We put too much pressure on the motor by mixing a very thick dough for cookies. It stripped the "gears" and couldn't be used on slow.... it would instantly go to the fastest speed. We had to take it to a reputable appliance store that does repairs on KitchenAid products. I'm still using mine and that has been 15 years ago. It still works great!!

Posted on Aug 29, 2010


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Posted on Jan 02, 2017


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What can I do to make my mixer turn on? It wont

Some ...what you may consider silly stuff...
1 check the outlet that you are plugging your mixer into it may be bad. Not the wire but the plug in the wall may be bad, plug a hair dryer in on high if it runs for 60 seconds it ok.
2 check the plug of the mixer make sure it is not bent at the wall pins
3 open the rear of the mixer by removing the round cover at the rear of the mixer look for loose wires, sometimes the socket connectors on the speed switch break off.
4 there are three screws on the speed control switch that control the mixer, sometimes after time these screws can actually turn due to vibration and the mixer will just not with the top right screw and turn it counter clock wise a quarter turn and start the mixer if it starts even for a half a second then the problem is in the switch. and your only problem is the proper timing set by the three screws.
5 gears inside the mixer can strip and freeze the motor so nothing turns...put your ear next to the machine mid way and turn it on ...if you hear a hum from inside then it is a gear problem.
6 If your machine is older then 1978 then it may be the IR filter inside the mixer (hard to find )
7 the carbon brushes that are located on the side of the mixer may have finally worn down (cheap fix) but there are four ways to put the new brushes into the machine and only one way works. You have to be careful with the beveled edge of the new brush and which way it fits back into the housing.
8 Now you are inside the mixer if everything else fails, the motor is the next step and it will require a full tear down, to repair, there are two parts the armature and the winding and each will take about thirty-five bucks to get and either or both will take about 2 hours to repair but if you go all the way down then you need a new gasket and gear grease clean and re-pack too. At this point you are performing an overhaul . let us know if this helps.

Aug 07, 2014 | KitchenAid K45SS Classic Stand Mixer

2 Answers

My kitchenaid stand mixer arm wobbles when I turn it on.

if the head wobbles on stand, flip mixer upside down, and tighten the pivot pin screw way deep down inside stand. you will need a long flat blade screwdriver. it's probably loose.

May 13, 2011 | KitchenAid KSM90 Ultra Power Series Stand...

1 Answer

I just replaced worm wheel on my KitchenAid Stand Mixer. Power was working prior to worm wheel breakage. Mixer was running, but not spinning. Dismantled Mixer, and replaced worm wheel. Put back...

Check the carbon brushes, look inside the hole, it is keyed, the brushes only go in properly one way. Match the missing corner on the brush to the blocker inside the brush holder.

Sep 07, 2017 | KitchenAid Food Mixers

1 Answer

My mixer made a grinding noise, so i oiled it

I am assuming that when you oiled it you merely squirted oil in various places without actually taking the mixer apart. You probably did a good thing corrects the grinding noise...but...oil is not only an excellent lubricant it is also a very good insulator and if you got oil into the switch area where it turns on then you may have got oil inside and it can be insulating the place where electrical contact is made. For a possible quickie solution you might try to use something to eliminate the oil that may have got into the switch. Best thing is probably to go to Radio Shack and buy their contact cleaner spray can and use it on the switch. That stuff is real expensive though. A cheaper solution might be to use isopropol alcohol if you have some handy or even spray carburetor cleaner as both of them will completely dry quickly. Be sure to unplug the unit before doing this and allow it to completely dry before plugging back in. You can do all of this without taking anything apart. If it then runs ok then I suspect the grinding noise is still there as the gears inside probably need a little grease. If you want to go that trouble you can remove screws and open the case up...carefully...and put a dab of auto wheel bearing grease on your finger and rub it into the area where the gear teeth are. Do not use a big gob of it ... just a little amount is all needed. If you do not have any grease handy you can use vasline if you have some in the house. If the mixer did not turn on after the above dousing of alcohol etc. from the outside then you may need to do the cleaning directly on it from if you do take the mixer apart spray the cleaner directly inside the switch. When you take the mixer apart do not remove the shaft/motor/armature or other parts...remove only the cover and enough to do the repair. The possible problem is that if you take it apart too much it will be difficult to get back together particularly if you remove the armature and contact area of the commutator where the carbon brushes are. While inside there though look at the copper commutator area where the tiny carbon brushes make electrical contact. They may be pitted or not allowing the brushes to make good connection. To correct this you can spray contact cleaner directly onto the contact area to clean it. Let it dry and reassemble and the mixer should run ok. If the mixer is very old and been used a lot then the contact area of the commutator may be worn so badly that it does not make good contact with the brushes or the brushes may be worn down so much that they no longer make good contact. In that case you would need to actually remove the armature assembly...what I told you not to do above if you are not too good at reassembling things. Once the armature is removed it is easy to take some fine grit sandpaper and clean the copper commutator making it clean and bright copper color like new again. Also if the carbon brushes are almost totally worn down you probably can find some new ones that will fit ok by taking the old ones to your local hardware store as many of them stock carbon brushes nowadays. If you do all this and are able to reassemble the mixer then it should be just about as good as new again. Hopefully you do not need to go to all the trouble of the major disassembly though. Good luck.

Aug 22, 2009 | Food Mixers

1 Answer

The pasta/meat grinder attachment stops turning

Its a 325 watt mixer. If you grind or mix dough often you may consider getting something stronger or turn it off every ten minutes or so and let it cool down. We burned a 325 and got the 575 watt "600" series and no problems ever since. I know these things are expensive. The 325 is more mixer than grinder. The attachements fit ANY size mixer but some are not recommended for use in all mixers.
If its quiting see my posts on "doesn't run at sitr" and "Removing the motor cover" To get inside and clean those contacts.

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3 Answers

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Try to push up while you turn the blade. Don't be afraiid to turn hard.

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1 Answer

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That spring does not turn the beaters. It is part of the beater release assembly. Probably one of the gears is worn.

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