ADG7550 not heating

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  • December 12, 2016 at 5:20 pm #90102
    davidkerr
    Participant

    Hi,
    I have a F3 fault and no water heating. I have checked the continuity and resistance of the heater element and the NTC and believe they are both normal. Is there any method to test the RE2 relay on the control board? Is there any other fault I should be looking for.
    Thanks.
    machine info is 8542 755 15860
    SER 33 0543 007421
    ADG 7550 Typ N1C
    Board service 212954
    Data 712944

    December 12, 2016 at 5:35 pm #443709
    electrofix
    Moderator

    Re: ADG7550 not heating

    only way you can check the relay is to measure the coil voltage when its live

    ie 12 volt relay and coil is at 9v dc or above and its not closing its gone

    Dave

    December 13, 2016 at 11:26 pm #443710
    davidkerr
    Participant

    Re: ADG7550 not heating

    Thanks Dave,
    I set out to check the relay but found the fault before I reached the relay. No continuity between one side of the heater and relay. One wire was broken by fatigue where it bends at the bottom of the door when it opens and closes, as was the flexible cable sheath.
    A nice easy and cheap repair, although it took me a while to find.
    This is a brilliant service.
    Many thanks.
    David.

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