Question about Braun KSM 2 Electric Blades Grinder

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My Braun KSM 2 has died, suddenly, after about 10 years. Just quit, no noise, nothing. I took apart, looking for a fuse or something to replace and I just see the copper resistance coil and "circuit springs" that close the circuit when button on top depressed. The circuit closes appropriately when button pressed, all soldering appears intact, blade is intact (removed and inspected). I've tried in other outlets. I don't see a reset button inside. I don't see anything that appears wrong or replaceable.

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There is a second switch, similar to the user accuated switch, which is opposite the user accuated switch when viewed from the bottom of the unit. This second switch is controlled by a piece of plastic which fails when the device overheats. I am currently seeking to replace that part on my unit.To fix the problem you will need to replace this part so that the second switch is closed. Both of the two switches on the bottom of the unit must be closed in order for the unit to operate.

Posted on Jan 15, 2012

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The following comment applies to the "HOUSEHOLD TYPE 4041, Model KSM2":

This coffee grinder is very industrious and I personally highly recommend it to anyone looking for a very nice household coffee grinder.

(skip to the bottom for the solution if you don't want to read the explanation, but i suggest you read the whole thing if you really want to understand what to do)

The aforementioned secondary fail safe will indeed 'fail' if at some point you used your grinder to the point of overheating (this grinder is meant for intermittent use and NOT continuous use). To fix this is actually very easy and only requires a number #2 (regular) philips screwdriver to remove the two bottom screws and pop the bottom off of the unit (obviously make sure your grinder is unplugged before attempting any sort of repair). Then you can slide the entire mechanism out (a small amount is all that is needed). If your'e mechanically inclined you should be able to recognize how the two switches work...the first is activated with the push switch on the lid...when this switch is depressed the small copper spring at the bottom of the unit makes contact with a metal prong which completes the circuit and powers the motor. The second switch is exactly opposite the first, and again is a copper spring that should make unity with a second metal prong constantly...however, as a fail safe, if the unit overheats this second spring will not make contact with the metal prong and therefore the unit will not work. This secondary switch (which I will now refer to as 'fail safe') is kept in contact with a small clear plastic spacer that makes contact with the copper winding and keeps the spring compressed and in contact. When the coil overheats this plastic spacer 'fail safe' melts slightly and will no longer keep the copper spring in contact with the prong.

Solution:
All you need to do is grab the copper extension..coming from the spring (with the unit unplugged from power!!!), and lift it over top of the metal prong so that it is now on the backside (opposite side of where it was) such that it is in constant and permanent contact with the metal prong..completing the circuit.

You will no longer have a fail safe so be sure to use caution when grinding and be sure to not overheat the unit or you will permanently break it (you would probably destroy the coper coils).

Posted on Dec 20, 2013

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Most likely, the motor windings have failed. You may be able to get Braun to repair/replace it.

Posted on Sep 15, 2010

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