Bosch D/W SGS45E08GB/45 What`s This?

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  • February 13, 2008 at 10:26 am #34572
    laurenceuk
    Participant

    Hi,

    This machine stopped heating the water but still completed the prog.

    I called, checked it out and then selected a prog and it began to heat the water ok.

    Didn`t know why it hadn`t heated.

    Left it with customer who used it three times ok but now is not heating again.

    I attended 2nd time, heater, stat, cabling, water metering all seem ok.

    But I don`t know what the pcb sensor does which is attached to the heater
    housing – has this anything to do with temperature or should I suspect the main control pcb.

    I have had the main pcb apart and found no dry joints which can occur on these parts.

    Inspiration would be appreciated – thanks.

    Laurence

    February 13, 2008 at 12:24 pm #243195
    Martin
    Participant

    Re: Bosch D/W SGS45E08GB/45 What`s This?

    laurenceuk wrote:But I don`t know what the pcb sensor does which is attached to the heater
    housing – has this anything to do with temperature or should I suspect the main control pcb.

    I guess you are refering to the Turbidity Sensor on the side of the heater box are you? That’s an infra-red device that works seperately from the heating function.

    3 possibilties for it not heating: –

    1. Element intermittent open circuit?
    2. Insufficient water in machine not allowing flow switch to operate?
    3. Dodgy module (relay sticking)?

    February 13, 2008 at 4:17 pm #243196
    laurenceuk
    Participant

    Re: Bosch D/W SGS45E08GB/45 What`s This?

    Thanks Martin,

    Whilst I did not check the heater for a circuit as I had allowed the machine to
    go on for about 20 mins after the dispenser had opened (assuming heater
    would come on after this happening) but no live was detected at the heater
    terminals. I therefore discounted the heater as a problem – besides I thought
    heaters either worked or they didn`t (I have had very rare occasions with
    washing m/cs when heaters are corroding out and have created a return –
    but I never say never.)

    The water level is fine so I am drawn to the control pcb – what a shame.

    Thanks for your input again, Martin.

    Laurence

    February 13, 2008 at 4:36 pm #243197
    Martin
    Participant

    Re: Bosch D/W SGS45E08GB/45 What`s This?

    Then it’s got to be the Module Laurence, order it from Bosch to be sure it includes the configuration coding…OK?

    February 15, 2008 at 10:25 pm #243198
    eastlmark
    Moderator

    Re: Bosch D/W SGS45E08GB/45 What`s This?

    Have a really close look for dry joints, especially around the low voltage side of the relays. I mean use a magnifier.

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