Question about Bosch Washing Machines

3 Answers

WFB 1605/2005 blew the breaker in the middle of the night while not running (we heard a noise). It's not the line capacitor just where the power comes in (last time it was a dead mouse lying across the terminals). The red plug on the timer goes to the culprit because unplugging it, allows the power to stay on. Dead short in some component. Not water solenoids either. Baffled

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  • jwtravis Oct 04, 2010

    I don't think it even has an SMPS to fail. All components are 240 v, synchronous motor for timer, pump, solenoids.

    There's dead short in one of the red plug's circuit coming off the timer (there are also a black and a yellow plug coming off different timing wheels.. I need someone who knows Bosch washing machine technology.

  • jwtravis Oct 04, 2010

    I am a qualified electrician, AND I stated that I had isolated the short to being off the red plug on the timer. There's also arcing and smoke emanating from the timer switch when I test it (after isolating components. My guess would be a locked rotor on the motor, but why then did it short out in the night when the machine wasn't running?? Please, only people familiar with Bosch washers answer--these wild shots are wasting my time. Maybe there aren't any on this service?

  • jwtravis Oct 05, 2010

    I just discovered the short in the door interlock on my own (taking the front panel off). so don't need any more answers. Not sure if others will see this or not--it's not clear how to use this system.

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  • Bosch Master
  • 12,061 Answers

Hi, yes as you have discovered the only thing that can or will trip a breaker or blow a fuse, is some sort of dead short, or close to it, across the line. from Phase to Neutral/Earth.
Usually then the problem is the bridge rectifier, and or some other components in the PSU Main Board.
As it is a short, it usually isn't too hard to find with a meter, set to OHMS. Metering IN, from the P & N terminals one should be able to find the short, and replace the components.
However components usually do NOT just spontaneously fail, indeed they do sometimes, but more often than not, there is either an external cause, power spike, surge etc. or an internal cause that caused too much current draw. Also there may be "Collateral" damage too, in any event, again usually the "Other" components on the main board will have been overstressed, and prone to failure again, if the board was repaired, this is why generally we replace the entire main Board, if there are any faults found, as in the long run,it will prove to be the best option.
To effect any repair one simply must have a service manual for your exact make and model, then at least you will have the wiring diagram and parts numbers, and troubleshooting steps.
Of course as usual it is my professional recommendation, to call an authorised service center and obtain a "Quote" for the repair.

Posted on Oct 05, 2010

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  • Master
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Hello. This problem could well be that that breaker in your panel is faulty, or that the connections at the breaker are loose, or that the connections in the receptacle are loose, or that the connections at either end of the washing machine plug are loose. IF you are trained to check these things, it is best to have a qualified electrician check it out, for safety's sake. Joe

Posted on Oct 04, 2010

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  • Bosch Master
  • 17,129 Answers

If this set is having the control panel which is electronic then it is possible that power supply unit if faulty which is a SMPS unit. Inthis case please check this link for help.

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Since the breaker is tripping it is confirmed that the front end of the power has a short. So use a multimeter to test , release the shorted component to confirm

Posted on Oct 04, 2010

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Posted on Jan 02, 2017

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