Question about KitchenAid K45SS Classic Stand Mixer

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My mixer will only operate on high speed - KitchenAid K45SS Classic Stand Mixer

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Check the contact of the low speed switch

Posted on Sep 01, 2010

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: sunbeam mixer

When you open it, there is are contact points and a piece that has to touch to change the speed. It may just be slightly bent or out of place. Some food may have gotten in there.

Posted on Jun 05, 2008

  • 16 Answers

SOURCE: mixer speed turned erratic!

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.  6.  Make sure you use common sense and unplug the mixer when making connections and such.

Posted on Dec 30, 2008

hslincoln
  • 235 Answers

SOURCE: My kitchen aid mixer model k45 will only operate

Hi REINO66, I suspect you (speed) Control Plate Assembly has gone bad and needs to be replaced.
The good news is that this can be fixed quite easily (OK, maybe with a little effort) by yourself if you are a DITY type person, feel adventurous, and your mixer is not under warranty. However, before you start to disassemble your mixer, be sure you have the Parts List manual on hand. If you're lacking one, you can download a PDF version from the KA website: http://www.kitchenaid.com/flash.cmd?/#/page/home.
Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, in your case use K45SSW, and select the file listed under Parts List (1), K45SSWH0.pdf (341.41 KB). Check to ensure it matches your mixer model.
Turn to pages 6 & 7, titled: Motor And Control Parts, which provides an exploded view for the disassembly and reassembly of your mixer’s electrical components, along with all the parts. Find Illus. No. 25, Control Plate Assembly, Part No. 240904-2, which is the part that needs to be replaced.
As far as parts go, here are four potential vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com. Prices for the same part can vary widely between vendors, so do your comparison shopping.
Here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer.

Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able replace your Control Plate Assembly.
Good luck and have fun. I hope this helps. Howard, Burke, VA
If this solution has helped you, please rate it, thanks! - hslincoln

Posted on Dec 22, 2009

SOURCE: mixer works on high speed but not low. Brushes

Motor brushes are fairly cheap to buy. It sounds like the first place to start: http://kitchenaidmixerspares.co.uk/Home/tabid/36/ProductID/88/Default.aspx

Posted on Jan 24, 2010

  • 2468 Answers

SOURCE: Mixer only operates at high speed regardless of the speed setting

the triac solid-state component on the board for the motor speed control is shorted and you need a new control board, unless you can find an outsource replacement triac,most companies won't sell you parts because of liability issues on internal parts of the unit

Posted on Apr 02, 2010

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Kitchenaid Hobart K45SS when set at 1-2 accelerates to high speed when making dough. How can I fix this?


Usually when the mixer runs only on high speed it is caused by the control plate adjusted incorrectly or the control plate spring unhooked. Remove the trim & end cover on the mixer and check the control plate spring, if unhooked, attach to bottom of the control plate and squeeze the spring end, also check the speed control plate screws,there are 3 screws on this plate, one at the bottom two at the top, see if adjusting the top screws slows your mixer down.
Next check the wiring of the mixer, Insure everything is wired correctly, to get wiring diagram go to the last page of the service manual. Here is a link to the service manual: http://lib.store.yahoo.net/lib/mendingshed/kitchenaidservicemanual.pdf
If neither of those fixes the problem it is probably a bad phase control board, or a shorted phase control board. With the line cord disconnected, pull the t-bar contacts to open and insert a piece of paper between them so they cannot close. Reapply power-the mixer should just run or buzz trying to run, if it operates at full speed the phase control is defective and needs to be replaced.
Use the service manual to aid you in taking apart the mixer, trouble shooting the problem and putting the mixer back together, based on the mixer only running at high speed some of the time I would assume it is the speed control phase board.
If you have any questions let me know.
Thank you,
Colleen
Customer Service
MendingShed.com

Apr 24, 2013 | KitchenAid Food Mixers

1 Answer

Mixer only runs at one speed


if it runs only at high speed it needs a new phase control board if the mixer is post 1978, if the mixer is pre 1978 then you will have to replace a capacitor on the end of the power cord inside the mixer. if the mixer only works on one speed that is not high speed then you need to adjust or replace the speed control plate on post 1978 mixers and the capacitor on pre 1978 machines. Hope that helps

Jan 30, 2013 | KitchenAid Food Mixers

1 Answer

My kitchenaid mixer run on high at all times


If your mixer only runs on high speed there are 3 things that can cause that. The first thing to check will be the speed control plate, Remove the trim and end cover on the mixer, the first thing you should see is the speed control plate, this has 3 screws on it, try adjusting the top two screws 1/4 turn, this should slow the mixer down, do not over tighten. Also check to see if the control plate spring is unhooked. If the spring is unhooked, attach to bottom of the control plate, and squeeze the spring end.
If this does not fix your mixer, check the wiring of the mixer, you can locate a wiring diagram on the last page of the service manual.
If the speed control plate is adjusted correctly and all the wiring is correct it will be your speed control phase board. You can test the speed control phase board to see if it is shorted. With the line cord disconnected, pull the t-b ar contacts to open, and insert a piece of paper between them so they cannot close. Reapply power-the mixer should just run or buzz trying to run. If it operates at full speed, teh phase control board is defective and needs to be replaced.
Here is a link to the service manual: http://lib.store.yahoo.net/lib/mendingshed/kitchenaidservicemanual.pdf
This will aid you in taking the mixer apart, troubleshooting and putting it back together, remember the wiring diagram is the very last page.
Thank you,
Colleen
Customer Service
MendingShed.com
800-339-9297

Jan 07, 2013 | KitchenAid K5SS Mixer Speed Control Plate...

1 Answer

It just quit while I was using on high speed.


The lady's model is a K45SS and it does not have a Hall Effect Senor, Her machine di not go to high speed, it STOPPED!!, and that is all we know. If the mixer motor still runs or operates then it is a gear problem and yes it would be the nylon worm gear made to fail in order to protect the motor from burning out. if it won't start at all no noise or movement then it is an electrical problem and it could be the speed control switch the brushes the phase control board the govorner or the motor. what is needed is more information from the lady seeking help.

Dec 12, 2012 | KitchenAid K45SS Classic Stand Mixer

1 Answer

SPEED CONTROL ALWAYS ON HIGH


Speed control plate at the back is stuck in the high position or you need a new phase board. That's the small PCB under the back cover at the top.

Nov 24, 2012 | KitchenAid K5SS Heavy Duty Commercial...

1 Answer

KitchenAid mixer speed surges high and low uncontrolably


You can get the high speed back if you want to play with those three screws. there is a timing scheme for your mixer and it is set and adjusted by manipulating those 3 screws. The bottom center screw is for speeds 6 8 and 10. The best choice is to replace this switch, about $10 bucks on ebay.

Nov 13, 2012 | KitchenAid K45SS Classic Stand Mixer

1 Answer

Mixer only operates at high speed regardless of the speed setting


the triac solid-state component on the board for the motor speed control is shorted and you need a new control board, unless you can find an outsource replacement triac,most companies won't sell you parts because of liability issues on internal parts of the unit

Apr 02, 2010 | KitchenAid K45SS Classic Stand Mixer

1 Answer

Mixer works on high speed but not low. Brushes


Motor brushes are fairly cheap to buy. It sounds like the first place to start: http://kitchenaidmixerspares.co.uk/Home/tabid/36/ProductID/88/Default.aspx

Jan 11, 2010 | KitchenAid K5SS Heavy Duty Commercial...

1 Answer

KitchenAid 2671 onmly run Stir and Second at high speed


Hi. Goto kitchenaid.com and download the parts catalog for your mixer model, these drawings will assist you in the disassembly and reassembly of your mixer.

You'll need to replace the speed control in your mixer. This is a common problem. Be prepared to wait at least a month for your parts to arrive. Unplug your mixer before you open it up.

If you're still under warranty call kitchenaid!

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

Jan 28, 2009 | KitchenAid KP26M1X Stand Mixer

1 Answer

Sunbeam mixer


When you open it, there is are contact points and a piece that has to touch to change the speed. It may just be slightly bent or out of place. Some food may have gotten in there.

Nov 25, 2007 | Sunbeam 2485 MixMaster Series Hand Mixer

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