Does the kitchenaid K45SS have a hall effect sensor?

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.

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.

Hi, RHASKEY. You don’t say what your model is, which would be most helpful, so I’m going to assume you’ve got one of the 6 qt Solid State mixers, models KD2661-3, KT2651-3 or KP2671-3 (an Epicurean or variation) or one of the 6 Qt. Professional 600 Bowl lift version like a KP26M1X model. Of course I could be way off base, too, so bear with me. BTW, the Hall Effect “switch” and Hall Effect “Sensor” are synonymous.
The Hall Effect sensor detects the rotation of the motor and limits the motors speed based upon your Selector switch lever setting. We don’t need to go into electromagnetic theory here, but it’s a pretty simple sensing device so I would suspect it’s not the cause of your problems. The Hall Effect Sensor feeds back to the (speed) Control Assembly and from your description of your mixer’s symptom’s I would say the signal is getting corrupted within the Control Assembly; hence the intermittent and erratic running.
The Control Assembly is a little PC board fabricated with numerous electronic parts; the more components the higher the probability one of them will go bad, for whatever reason. My recommendation would be to replace the Control Assembly board, but you can always order and replace the Hall Effect Sensor, too… We’re only talking a couple of dollars difference in parts.
The inspection and troubleshooting of the inside of your mixer is a DITY capability, particularly if your mixer is out of warranty. Just be sure to 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> and enter the 6 character model number and select one of the files listed under Parts List (check to see it this matches your mixer model).
After you’ve removed the Gearcase Motor Housing (mixer head top half) look where the Speed Control knob is attached. This will be the Control assembly. Inspect all the connections to see if a connection has come loose. Unfortunately the whole controller assembly is fabricated on a little PC board filled with resistors, capacitors and diodes, which was not meant to be 'home fixed'. My 'expertise' ends at being able to recognize a resistor from a capacitor. A local small appliance repair shop should be able to determine if the controller assembly is functioning properly or not or you can just order replacement parts without the testing.
As far as KA replacement 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.
While your mixer is apart it would be ideal to check for any other unseemly wear and tear on the gears, etc. It can be messy but quite gratifying to diagnose and repair your mixer yourself.
Here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer.

• http://www.artisanbreadbaking.com/discussions/kitchen-aid.htm
• http://www.neilcrockett.com/mixer.htm
• http://www.foodonthefood.com/food_on_the_food/2009/04/how-to-repair-a-kitchenaid-mixer-yourself.html

Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able to completely disassemble and reassemble your mixer.
Good luck and have fun. I hope this helps. Howard, Burke, VA
If this solution has been helpful, please rate it, thanks! – hslincoln

The speed of these mixers is controlled by a component inside of the unit known as a Hall Sensor. This part is simple to remove and install. Just contact your nearest kitchenaid parts supplier for this item. It will cost about $13.00.

Be sure to unplug your mixer before removing the cover. You will need a phillips head screwdriver. Once inside you will be able to unplug the hall sensor from the control panel and from the top of the driveshaft. good luck

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.

BobbyT

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.

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. 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 if 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.

I would recommend that you first check the Hall Effect sensor which determines the mixer’s 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 mixer 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 the original Hall Effect sensor except that the connection between the control board and sensor was not snug and tight--unfortunately I didn't check the connection before I decided to buy another sensor. 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 gear case cover.
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 is correct.  It's difficult to tell which way the sensor should be connected because the control board has three prongs and the sensor can attach facing up or down. After you've made the connection, run the mixer. If it still doesn't work, disconnect the sensor, reconnect it with the prongs facing the opposite direction and try it again.  I actually found the right sensor orientation through a little trial and error.  But by going through this trial and error, I also had my Eureka moment when I realized that the original sensor probably would also work if it were reconnected with correct orientation.  
5.  This whole process probably takes less than 10-15 minutes to perform.
6.  Finally, use your common sense and make sure to unplug the mixer before checking, connecting or disconnecting anything.

I would recommend that you first check the Hall Effect sensor which determines the mixer’s 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 mixer 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 snug and tight. Guess what?  My original sensor also made my mixer work!  There was nothing wrong with the original Hall Effect sensor except that the connection between the control board and sensor was not tight--unfortunately I didn't check the connection before I decided to buy another sensor. My guess is that the connection between the control board and the sensor probably loosens or comes undone over time from use and vibrations. To fix your problem:
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 gear case cover.
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 is correct.  It's difficult to tell which way the sensor should be connected because the control board has three prongs and the sensor can attach facing up or down. After you've made the connection, run the mixer. If it still doesn't work, disconnect the sensor, reconnect it with the prongs facing the opposite direction and try it again.  I actually found the right sensor orientation through a little trial and error.  But by going through this trial and error, I also had my Eureka moment when I realized that the original sensor probably would also work if it were reconnected with correct orientation.  
5.  This whole process probably takes about 10-15 minutes to perform.
6.  Finally, use your common sense and make sure to unplug the mixer before checking, connecting or disconnecting anything.

First thing, check the Hall Effect Sensor (part # 9703312) to make sure that it is seated snugly AND properly!  The Hall Effect sensor measures the speed of a tiny rotating magnet and basically tells your mixer how fast it should rotate.  I was experiencing the same problem that many others have described here--my mixer would go really fast no matter what speed I put it on and it would shut off after five seconds. I came to the FixYa site and saw that one solution that seemed to work was to replace the Hall Effect sensor.  So I went to a local hardware store and purchased a new Hall Effect Sensor for about $13.  After I replaced the "defective" sensor, my mixer still did not work.  So, I started experimenting with the three prong orientation of the control board--this can make a big difference. After a little trial and error, I found the correct orientation for the sensor and my mixer worked good as new!  But I was curious to see if the improper orientation was the cause of my original "defective" sensor.  So I put the "defective" sensor back with the proper orientation and THIS ALSO FIXED MY SPEED PROBLEM! There was nothing wrong with my original Hall Effect Sensor at all--it simply was not snugly or properly seated!  I'm not sure how it happened--possibly over time the sensor prongs may have become unseated from the vibrations of running the mixer on high speeds--but my original Hall sensor was not seated properly or snugly.  So before you run out and buy a new Hall Effect sensor make sure that the original one is not only snugly seated but also properly oriented!  If I knew how to add digital pics, I would have put pictures in my comments to clearly demonstrate what I found.  Unfortunately, I am not sure how to do this.   To sum this up: 1. Download the parts information and diagrams from the Kitchenaid site and find the Hall sensor (part # 9703312).  2. Make sure that the Hall sensor is firmly attached on both ends.  The actual sensor should be located next to a tiny magnet and this end needs to be securely seated.  And the other end of the Hall effect sensor has three small prong holes which also need to be firmly and corrected seated to the control board! Bottom line, my mixer is working like new and I put the original Hall Effect sensor back in the mixer. I'm going to hold on the new one as a backup...you never know.