Bosch SGS43A12GB has no power (no lights)

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  • May 9, 2011 at 8:37 pm #62687
    mikevernon
    Participant

    My Bosch dishwasher does not power up (no lights on the control panel).
    I’m getting voltage at the on/off switch, and I’ve now removed the control module but there are no obvious signs of burnt out components on the two boards inside it.
    Any ideas please?

    May 10, 2011 at 8:23 pm #350951
    kwatt
    Keymaster

    Re: Bosch SGS43A12GB has no power (no lights)

    Door switch?

    K.

    May 11, 2011 at 10:00 am #350952
    mikevernon
    Participant

    Re: Bosch SGS43A12GB has no power (no lights)

    Kwatt. Would a faulty door switch result in no lights whatsoever on the display?

    May 11, 2011 at 11:22 am #350953
    Martin
    Participant

    Re: Bosch SGS43A12GB has no power (no lights)

    mikevernon wrote:Kwatt. Would a faulty door switch result in no lights whatsoever on the display?

    Usually it’s the main module that goes AWOL. (New module part number = 498607)

    May 11, 2011 at 12:21 pm #350954
    mikevernon
    Participant

    Re: Bosch SGS43A12GB has no power (no lights)

    Thanks Martin. As I said in my original post, the module shows no signs of burning or other damage. It is an expensive part so i wouldn’t take the risk of fitting a new one unless I was sure that was he cause of the problem.
    On the other hand I’m reluctant to scrap an otherwise immaculate machine.
    Is there any way I can test the module?

    May 11, 2011 at 2:22 pm #350955
    Martin
    Participant

    Re: Bosch SGS43A12GB has no power (no lights)

    mikevernon wrote:Is there any way I can test the module?

    Nope, but it’s the Module that needs replacing 99{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} of the time with these exact symptoms. Make of that what you will but all I can add is that I’ve replaced dozens………

    May 11, 2011 at 7:31 pm #350956
    mikevernon
    Participant

    Re: Bosch SGS43A12GB has no power (no lights)

    I now think the on/off switch may be the cause of the problem, which would seem a more logical explanation than the module. And cheaper!
    I’ve tested the switch and the end two terminals appear to do nothing (there are 6 terminals and 6 wires connecting to them). Neither of these two terminals have continuity with any of the other terminals, whether the switch is in the off or on position. I can’t think of any explanation for this other than a faulty switch.
    The switch terminals could just be corroded so I’m trying to pull the switch apart to have a look, but so far without success.
    Has anybody managed to get the on/off switch apart?

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