Mixer turns but makes a clunking noise, stops on contact.

You could take the brush covers off and pull the brushes out and look down the hole with a torch and see if you can see anything unusual down there. Also back cover off and look at the switch, wires and governor. If nothing is noted then you will be pulling it apart looking and testing until you find the fault. Making a clunk sound followed by death sounds to me like something has engaged with the motor armature and the majority of that is deep inside. Here in NZ those things have a 5 year guarantee, if wherever you are is close to still being in guarantee you should get it to a repair agent for repair without fiddling about.

You are probably going to have to remove the top housing and look and listen while it is running. Does it lose drive when it is being noisy? You need to remove the back cover, the silver band with Kitchen Aid on it and that will expose the 4 screws holding the housing on. Remember fingers and tools OUT while it is plugged in or running. I can't be a lot more help to you, we don't have that model in NZ.

It would be helpful to get the model number and serial number off of the bottom of the mixer. This will help determine if the gearing has changed at all.

Usually when a mixer is making a lot of noise after replacing the gears we can find a small nick or gouge in the gear. even the smallest damage can cause these mixers to make a lot of noise. Also if you have an older mixer there was a change in the worm gear from 53 teeth to 60 teeth on the gear. If your mixer originally took a 53 tooth gear, and you replaced it with the 60 tooth gear it will make a lot of noise like you are describing.

So first check your serial number, if the first 4 digits are after WL45 your mixer would have a 60 tooth gear, however if it is a WL44 or before you would have originally had a 53 tooth gear and this is what is causing the loud noise.

If your mixer is new enough that it took the 60 tooth gear, then take the mixer apart, clean and remove all gears, clean them off with wd-40 and inspect closely, even the smallest chip can cause a ton of noise.

If you have any questions, or you cannot find the problem feel free to contact us at The Mending Shed.

Thank you,

Colleen
Customer Service
MendingShed.com
800-339-9297

We Repair Anything Under the Moon!

Get a Copy of the Repair Part List from Kitchenaid.com.
First thing I would do is to check the two Motor Brushes (one on each
side of the Motor Housing). Make sure they are not worn out, and when
inserted, they must both make contact with the Motor Coils. If even
one of them is not in contact with the coils, the motor will not run.
You can also remove the Motor Housing and visually verify that they
are touching the Coils.
You may also need to adjust the mixer speeds:

Remove the screw holding the End Cover and locate the three screws from the Control Plate.
All three (2 top left and right, and 1 bottom) must be adjusted. Make sure that the Control
Plate is not damaged in any way, contacts are not charred or burnt,etc...

1. Loosen the lock nuts enough & Turn the 2 top screws clockwise until they cannot be turned
anymore. Leave the bottom screw alone for now.
2. Use a dab of white paint or paper whiteout to mark the positions of the Phillips screws.
3. Plug in your mixer and Set the speed selector to "Stir".
4. Turn each top screw One full turn couterclockwise (alternating between Left and Right)
Keep making one full turn at the time (for both left and right) until the motor starts running.
5. Put your hand near the Agitator shaft and allow it to brush your finger slightly. Use your
watch or clock and start counting the number of times the shaft touches your finger in
60 seconds. The correct count should be 60 RPM (Rounds Per Minute). If it is less
or more than 60, give each screw 1/4 turn counterclockwise or clockwise and start counting
again. Now tighten both lock nuts.
6. Set the speed selector to "6" and turn the bottom screw either clockwise or counterclockwise
to achieve a speed of 180 RPM.

For your reference, the planetary RPM's for the 5-qt. tilt-head Artisan Stand Mixer are as follows:
Stir speed - 60
Speed 2 - 95
Speed 4 - 135
Speed 6 - 180
Speed 8 - 225
Speed 10 - 280

Hi HENNY346. Your Bosch mixer is belt driven and from the description of your mixer’s symptoms I suspect that the drive belt has come loose or failed completely so it stopped driving the dough hook. You say that when you turn the mixer on, it makes a noise, which may be the motor running without any load, but your description of ‘noise’ is very vague.
The good news is that you should be able to diagnose and fix this 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.
Here are links to two online parts vendors for your Bosch mixer that also provide an exploded view diagram along with part names, numbers and prices. They are: Cook's Quarters and AppliancePartsPros.com It can be very gratifying to go “under the hood”, figure out what’s wrong and fix it yourself. Good luck , I hope this helps. Howard, Burke, VA
If this solution was helpful, please rate it, thanks! – hslincoln

I determined that the switch that controls whether the mixer is on or off is controlled by a copper bar with a contact. The contact got fused to the copper bar, possibly due to a short. Since the contact got fused to the copper bar, the circuit was always connected, so the mixer was always on. The solution was to 1) unplug the mixer, and 2) take a screw driver and gently pry the contact away from the copper bar. When the mixer is in the off position, the copper bar and contact are no longer in contact. When the mixer is on, the copper bar and contact make contact. My mixer now works just fine. Yea!

It sparked, too? It's dead.

Disassembly and inspection is the only way to verify what it is. It sounds like you are correct. I have bought parts very reasonably on line and repaired our K/A mixer. The better sites ( I think I used appliancerepair.com) have exploded diagrams. If you are tearing into yours, these are invaluable, and when you get to the broken part, you'll have a name for it.

Best regards, --W/D--

Hi. These mixers normaly make a lot of noise when in operation. Go to the shop that sold it to you, or any place that has these units on display and ask them to turn on the mixer for a demonstration. If their mixer does not make the same noise, then contact Kitchenaid Customer Service and ask for a replacement under warranty. If this solution assists you, please rate it. Good luck! ricardok45

this is common for any device that has a motor,either the gears are grinding or the motors contact brushes need replacing, it will have to be looked at to determine the exact cause