Question about Braun Aromaster KF 400 Coffee Maker

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NO POWER The coffee maker's power light comes on, but it won't make coffee or heat the burner. I did find later that the stove wasn't working, where the coffee maker was plugged in, and found that one of the cartridge fuses for the stove had blown. When that was changed the stove worked, but the coffee maker still did not. I love my Braun and have only had it for about a year. So, it shouldn't be junk already. Help?

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  • Anonymous Feb 07, 2009

    Don't know anything about fuses, but my KF400 just stopped working in the middle of making coffee. The power light is still lit, when I turn it on, but the machine doesn't doo anything.

  • tzarcone May 11, 2010

    I've had two of these units for my office at work and they both stopped working after about two years. The indicator lights up but the plate does not heat.


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There are 4 electrical parts
1 switch
2 thermal switch (keeps heater at around boiling temperature)
3 thermal fuse (will break if thermal switch gets stuck on, to prevent fire)
4 heating element (the hotplate and surrounding tube that boils water)

since the switch lights and hot plate is not hot then it is #2,3 or 4 that is not working.
it is most likeley the thermal switch which is not too expensive to replace.

check the thermal switch by disconnecting it from the wires. at room temperature the thermal switch should be closed. test with a meter set on resistance.

if it is not that check the thermal fuse in the same way, it should also be closed.

if those test ok and the heating element is bad (doubtful) then get another machine and save this for parts

Posted on Jan 04, 2010

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