Kitchenaid k45ss runs only at high speed - KitchenAid K45SS Classic Stand Mixer

Did you clean the are around the variable-speed control lever?

Please be sure to unplug the mixer BEFORE disassembling the mixer.

http://www.ereplacementparts.com/kitchenaid-k45sswh0-classic-stand-mixer-parts-c-114958_114959_115060.html?page=4

http://www.ereplacementparts.com/article/11983/How_to_Replace_the_Speed_Sensor_and_Control_Board_on_a_KitchenAid_Pro_6_Mixer.html

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

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.

First the K45SS does not have a hall effect sensor. the pro series the epicurean seines and the pro series 5 use them, The K45ss system uses a phase control board a speed control plate and a governor for speed control. the governor rarely goes out the phase control board is a likely culprit but the system would work only in high gear if it was bad. I agree with the guest above in that it sounds like the retaining nuts on the adjusting screws of the speed control board have worked themselves loose and the adjustment screws themselves have vibrated out of proper position.

The Kitchenaid uses a centrifugal switch to maintain a constant speed. This must be sticking to cause this. You mixer will need to be disassembled and inspected.

the lower setting is for stirring. this is a high quality machine that is made to take a beating. you are just hearing the motor wind up. think of it like a jet engine starting, its made to run its smoothest at high rpm's, so it sounds funny at low rpm's but nothing is wrong with it.

Hello Mayfix,

The problem with your mixer is the speed control switch, this switch is located at the back of the unit. It is usually black and has all of the wires coming into it, the Item # 1394070 and cost $27.95 it can be located at RepairClinic.com he is a link
http://www.repairclinic.com/Kitchenaid-Switch-Parts?z=100&gclid=CKSD5NriuKcCFUVqKgodIE2b_g

You will have to adjust after you install you will adjust the two screws at the top of the switch while the machine is running inorder to make sure that you are getting all the speeds. Be careful as there is a possibility of electrical shock if you touch the wronge thing.

Thank you for using FixYa.

I just downloaded the KitchenAid service manual from http://www.mendingshed.com/kitaidparts.html
In that manual, on page 13, for the problem "mixer runs at full speed", two possible causes are listed: control plate spring unhooked or phase control shorted. There are instructions about how to proceed in each case. I'll be trying that out on my machine.

Yes it is compatible. You may also have a problem with the control plate

Hi. Go to mendingshed.com and download their free Kitchenaid Service Manual. This valuable document will help you to tune up your mixer, and covers the K45SS model. They also sell kitchenaid parts.

Go to kitchenaid.com and search for a parts manual for your mixer. Enter your model# thusly k45sswh.

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