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Krups produce a premium product and it would be surprising if they didn't also have a repair or exchange service. Sometimes such a service is a reasonable cost and it is advisable to at least make the enquiry before proceeding further with your home repair.
Early food mixers used a number of series resistors for speed control and the circuit was fairly straightforward to check with a multimeter and any capacitors found are likely to be radio interference suppressors.
Later mixers use an electronic speed control and the best mixers use feedback to maintain the speed and torque when mixing or beating viscous material that would otherwise slow the speed significantly.
Checking/troubleshooting the electronics are beyond the scope of home repair, however, the circuit can be checked to the speed control fairly simply and then from the speed control to the motor and the motor itself. If everything else checks out then it would be reasonable to assume the electronic speed control has failed.
Early electronic speed control used either a thyristor as the control device or a diac/triac pair mounted on a small circuit board. Later types probably use a speed control module similar in principle to those found in power drills...
I have repaired my same mixer a few times, first was replacing the plastic gear that is fairly common. Next I replaced the bearing and then the motor eventually, recently I replaced the main board. All these parts are fairly cheap and easy to replace. I have never had one smoke however so it is possible a wire could have rubbed enough to be shorting. Take the back cover off and inspect, its just the one screw on top and the main board is in there and see if any wires look shorted.
The speed selector circuit has been compromised but either an electrical short, or disruption from particles that entered the switching mechanism and covered contacts. Needs technical attention.
This sounds to me like the brushes in the motor need to be replaced. You may want to call an area shop which rebuilds electric motors and see if they have a replacement for you. They're not very expensive and fairly easy to replace.
I hope this helps and I hope you have a wonderful holiday season!
This sounds like an issue of beater to bowl adjustment, which can come out of alignment naturally over time and with use of the machine.
If the flat beater is striking the bottom of your bowl, this may cause the locking mechanism to loosen and may cause the mixing head to "bounce" during use.
Your Use and Care Guide will cover the "beater to bowl adjustment," which you can do at home in a few minutes with a flathead screwdriver.
Are you mixing at a high speed. For bread, you shouldn't go above a '2' setting on most of the mixers and keep the time fairly short -- more isn't needed.
Sorry if this is redundant, but info posted to another problem works here as well:
KitchenAid has one of the best user forums of any company as far as I'm
concerned. The participants are great and the monitors are exceptional
(some of the best problem solvers you are likely to run across). You
may find your experience already has a thread, if not, post it. I
checked in and they seem to have added a video library that has some of
the topics I've seen posted at this site.
http://www.kitchenaidconversations.com/
As far as I know this is a food mixer. Concrete will definitely cause the overload to trip. Frequent triping has caused the overload to weaken and hence trip at lower values. You probably need to replace the overl;oad
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