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Bosch dishwasher fog horn noise

Discussion in 'Appliances' started by duzu, 19 Jun 2019.

  1. duzu

    duzu

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    I've recently had to take my Bosch dishwasher apart to replace the heater element assembly. This involved disconnecting and refitting the sump assembly, circulation motor, drain pump, some internal piping etc.

    The dishwasher now works fine however every now and then it makes a moan similar to the sound of a fog horn. I've uploaded a recording here: https://instaud.io/3PZC

    Any ideas what could be causing this?
     
  2. blup

    blup

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    How old is the machine?

    Does the noise happen when the dishwasher is under load e.g draining or pumping?

    Blup
     
  3. duzu

    duzu

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    The machine is abour 10 years old.

    Yes, the sound comes when it is circulating water but not immediately when it starts circulating. You can heat water circulating both before, during and after the noise.
     
  4. jj4091

    jj4091

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    I can't hear anything in your recording, but not having isolator valves or stop taps fully open can cause some strange noises due to water flow.
     
  5. blup

    blup

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    Maybe when refitting the pump and motor some damage occurred to one or the other, or the circuit connections.

    Blup
     
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