Bosch Dishwasher no supply to element

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  • June 26, 2012 at 12:22 pm #70149
    jonnyveeee
    Participant

    Im currently working on a Bosch slimline dishwasher.

    Symptoms were the dishwasher carried on forever so I sent the board away for repair & have refitted it.

    The machine still has no supply to the element & continues washing for ever in cold water!

    Any ideas would be greatfully recieved!

    Jon

    June 26, 2012 at 6:36 pm #377196
    Martin
    Participant

    Bosch Dishwasher no supply to element

    First off, welcome to the forums, I guess you are a newbie?

    You didn’t enlighten us on the model number (Enr no) so try to do that next time you post a question as it does help obviously.

    I presume you have checked if you are getting 240v to the element and that the element is OK?

    June 26, 2012 at 7:33 pm #377197
    jonnyveeee
    Participant

    Re: Bosch Dishwasher no supply to element

    Hi Martin

    Thanks for reply.. I am a newbie!!

    Im getting 24 ohms across the element & Im not getting a 240 supply to it..

    The ENR is SRS43C12GB/14

    June 26, 2012 at 7:39 pm #377198
    Hollytree_Technical
    Participant

    Re: Bosch Dishwasher no supply to element

    2 things I would check are:
    Is the overheat stat tripped and if so is the NTC ok? (both are located in the black/grey unit mounted on top of the heater box (overheat one side and NTC the other)
    Is the pressure switch on the end of the heater getting power?

    Jem

    June 26, 2012 at 7:54 pm #377199
    jonnyveeee
    Participant

    Re: Bosch Dishwasher no supply to element

    Hi Jem.. Thanks for that

    There is a microswitch on the end of heater box which closes (continuity) when machine has water in it.. So that seems ok..

    I can see a stat type object on top of the heater box which seems to be open circuit (no continuity) but Ive checked this against another Bosch dishwasher & that is the same so Im presuming this is correct!

    What is the NTC?.. What does it look like?

    Jon

    June 26, 2012 at 8:13 pm #377200
    Hollytree_Technical
    Participant

    Re: Bosch Dishwasher no supply to element

    The stat type object as you describe it contains both the NTC and the overheat stat – I cant remember which side is which but there should be 2 connectors each with 2 wires going to it, the connector with the thicker wires which should be wired in line with the heater is the over temp stat and should NOT be open circuit, the other side is the NTC which should give a resistance value (not short circuit or open circuit but can’t remember exactly what).

    Jem

    June 26, 2012 at 8:17 pm #377201
    jonnyveeee
    Participant

    Re: Bosch Dishwasher no supply to element

    Cheers Jem

    Will have a tinker with it tomorrow when I have regained my sanity!

    Thanks very much for your help

    Jon

    June 26, 2012 at 9:23 pm #377202
    Martin
    Participant

    Bosch Dishwasher no supply to element

    I’ve never ever had any probs with the t/stat OR the thermistor (NTC) on the heater box. No volts to the miroswitch and neutral return (as the PCB is switched on the neutral) then it’s a duff PCB every time! 😉

    June 26, 2012 at 10:24 pm #377203
    Hollytree_Technical
    Participant

    Re: Bosch Dishwasher no supply to element

    I’ve had a couple of this range of machines where the thermistor has gone open circuit and then caused the overheat stat to trip.

    Jem

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