Question about KitchenAid K45SS Classic Stand Mixer

2 Answers

Speed switch doesn't work, Hi speed only

I have a Kitchenaid 575 watt, 6qt. mixer. After about 10 minutes of use, the ten speed switch no longer controlls the speed. It will only turn on and be at the highest speed. It will turn off and some times will not turn on at all. If it sits for about 45 minutes it will be fine. But after using it again the same problem will occur.My daughter loves to bake and I want to fix this problem as soon as possible. Thank you

Posted by on

  • 1 more comment 
  • forrestm Dec 19, 2008

    I was making dough today and my mixer seems to have doubled its speed. The speed control does change the speed, but everything is light speed. I'm going to take it apart tonight and take a look at it.

  • gfisch Feb 19, 2009

    I went to make a batch of bread the other day, put the dry ingredients in my Kitchen Aid Professional Stand Mixer and turned it on at the lowest possible setting...only to see flour spewing out of the bowl as the speed of the mixer was off the charts. It sounded as if my mixer was about to launch into space. I turned it off and turned it back on as slowly as possible and once again warp speed - smelled the motor burning a bit. Decided to make the bread by hand. Later, I showed my husband...and the exact same thing happened again.

  • forrestm May 11, 2010

    I downloaded the service manual and found this "mixer runs at very high speeds" problem listed in the back. I did both of the suggested methods to narrow down the problem.
    1. The spring on the bottom wasn't detached as they suggested it might be
    2. They suggested it might be a problem with the phase control. I put a piece of paper between the T-bar and the motor "chattered". They said if it ran normally then it was probably a problem with the phase control, but my motor tested fine.

    So I'm stuck with opening the planetary gearbox to see if anything in there is broken. This problem is so strange because it runs smoothly, no weird noises, the motor still has plenty of torque, it just runs ridiculously fast.




2 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

CAREFUL, do this unplugged. Behind the back plate (one screw on top to remove) there is an adjustment single security screw, lower center. Adjust this screw out or in as needed. Hit or miss but very easy. Repeat till all speeds work as designed.


Posted on Dec 20, 2008

  • Brian Higgins
    Brian Higgins Sep 30, 2014

    There is no adjustment screw in the 450 watt mixer, which I have, which has the same problem: it runs only on high speed, and sometimes does not turn on at all. There is brown, oily liquid head of mixer, probably transmission fluid. I guess there is a leak in the gasket. Also, my model# doesn't seem to exist anymore, KM25G


  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 20 times.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 16 Answers

Joedeven, I would recommend that you first check the Hall effect sensor which determines the speed.  I had this exact problem and I actually went out and bought another Hall sensor for about $13.  I replaced the original sensor and made sure that the connection between the sensor and control board was nice and snug. My blender worked as good as new! But I was curious to know if my original sensor was defective so I put it back in mixer and again made sure all of the connections were tight.  Guess what?  My original sensor also made my mixer work!  There was nothing wrong with my original Hall effect sensor except the connection between the control board and sensor was not adequate--unfortunately I didn't check the connections before I decided to buy another one. My guess is that the connection between the control board and the sensor probably loosens or comes undone over time from use and vibrations.
1.  Download the mixer parts and diagrams from the Kitchenaid website to see what the Hall effect sensor looks like. BTW the part number is 9703312. 2.  You'll need a phillips head screwdriver to open up the mixer. 3.  Make sure that the connection between the control board and sensor is absolutely tight and snug. 4.  Also, make sure that the orientation of the sensor connection between the control board and sensor is correct. it's hard to know which way the sensor should be connected because the control board has three prongs and the sensor can attach facing up or facing down. If, after you've made the connections, the mixer still doesn't work.  Disconnect the sensor and reconnect it with the prongs facing the opposite direction and try it.  I actually found the right orientation through trial and error.  By going through this trial and error, I also had my Eureka moment when I realized that the original sensor probably would also work it were reconnected with correct orientation.   5.  This whole process probably takes less than 10-15 minutes to perform.

Posted on Dec 30, 2008

  • joyofbaking Dec 30, 2008

    Oops I accidentally typed in "blender" when it obviously should have been "mixer."  I think this will fix your problem.  Happy mixing.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How do I fix a kitchen aid mixer that possibly shorted out?

Buy a new one quick. Or hide. Spent . electrical engineering. And supply of new diodes resistors and capacitors are needed.

Apr 17, 2016 | KitchenAid New Professional 5.5 QT...

1 Answer

One speed on slide switch will not go high or low

It's most likely a bad sensor. If a new sensor doesn't fix the problem, then the circuit board would have to be replaced as well.

Nov 12, 2014 | KitchenAid KP26M1XPM Professional 600...

2 Answers

What size fuse is needed for a 600b mixer?

I am guessing you have an older Peavey mixer amp. I believe these mostly used 8 amp fuses although older earlier ones may have used different. It should say on the back at the fuse holder. You can get these at Radio Shack, at better hardware store in either auto electrical or electric sections or on line.

Oct 05, 2014 | Food Mixers

1 Answer

325 k5ss mixer stir speed not working, but works in all other gears

First congrats on the great mixer that you have. next the pro 6 or professional 600 series mixers are of an entirely different design than the one that you have even though they are both bowl lift. Do you really need 6 quarts capacity? The pro series is a 575 watt mixer BTW, and it will have more power available to you IF you are doing bread or a lot of food grinding, if that is a requirement that you have then the 6 / 600 series is the better suited mixer but if all you are doing is general medium to light mixing duties then fix and keep the K5SS it a great machine,

Mar 02, 2013 | KitchenAid K5SS Heavy Duty Commercial...

1 Answer

Kp26m1xwh Kitchenaid mixer 575 watt stopped working.

On the back of the mixer is a screw holding on the Kitchenaid name plate band that wraps around the mixer. Remove this screw and the name plate and then you'll see four screws (two on each side) holding on the top cover for the mixer. Remove the four screws and then lift off the top cover and you'll see the motor, circuit board and gear box that operate the mixer.

May 29, 2010 | KitchenAid KP26M1X Stand Mixer

1 Answer

The latch/switch on the speed control board is stuck

You need to take the back cover off and then split the gear cases to find the mechanical reason why the lever is stuck. Take the motor off the pedestal, remove the planetary and undo the 9 screws that hold the bottom gearcase to the top housing. You will need to unplug the white and the black wires from one side of the speed control plate.

Jun 14, 2017 | KitchenAid K45SS Classic Stand Mixer

1 Answer

575 watt 6qt stand mixer. start out on low speed

Hi. If your mixer is still under warranty, call Kitchenaid, they are usually very good at replacing mixers under warranty.

If you're out of warranty, you'll need to order a new speed control board. Use the following link to download the parts catalog for your mixer.

You can remove and replace this board yourself. Use the drawings to assist you with the project.

If this solution has assisted you, please rate it. Good luck! ricardok45

Mar 16, 2009 | KitchenAid KP26M1X Stand Mixer

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.

Feb 08, 2009 | KitchenAid KSM150PS Artisan Series Stand...

1 Answer

Knocking sound

Same problem here! How can I fix it? I'm in the middle of important Christmas baking!

Jul 04, 2008 | KitchenAid 32685 Mixer

Not finding what you are looking for?
KitchenAid K45SS Classic Stand Mixer Logo

6,125 people viewed this question

Ask a Question

Usually answered in minutes!

Top KitchenAid Food Mixers Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

jack arons

Level 2 Expert

44 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22382 Answers

Are you a KitchenAid Food Mixer Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides