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Bosch Classixx 1200 Express trips mains mid cycle

Discussion in 'Appliances' started by loftconverter2011, 14 Mar 2016.

  1. loftconverter2011

    loftconverter2011

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    Looking for a bit of advice on our washing machine.

    It's a Bosch Classixx 1200 Express (WAE24162UK) and until now has been faultless in operation. However last Sunday it began to trip the mains about 10 minutes into a cycle.

    The main panel lights up, the drain pump seems to work, the motor spins (though I haven't been able to see it do high speeds due to the point it cuts off) and the door interlock works.

    I took some advice from the web and pulled the machine out to inspect key parts.

    -The heating element was removed and showed continuity both in and out of water (bucket test).
    -The thermistor? seemed to check out OK too
    -The drain pump was removed and cleaned. I found a wet grey paste which felt like grease inside the drum holding the motor armature. Having never seen one new I don't know if this is normal as it seems like a sealed unit.
    -The main motor was removed. The brushes are around an inch long and worn evenly.

    I've ordered a new drain pump, carbon brushes and heater element as they aren't expensive and all these parts are easy to replace.

    Can anyone recommend any other checks on this machine? I wondered if it would be possible to disconnect each component and run the machine to eliminate the issue.
     
    Last edited: 14 Mar 2016
  2. bernardgreen

    bernardgreen

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    The bucket test ? Did you test for earth leakage between element terminals and the metal sheath of the element ?.

    Is it the RCD that is tripping ( due to earth leakage ) or the MCB ( due to current overload ) ?
     
    Last edited: 14 Mar 2016
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  3. assuhors

    assuhors

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    Cancel the pump and brushes they won't be causing trip switch to trip.
     
  4. stephenco

    stephenco

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  5. nicam49

    nicam49

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    It's most likely the heating element, because it doesn't get switched on until the wash cycle has been going for 10 minutes anyway.
     
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