Zanussi zdt21001fa not heating

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  • #97171
    Daryl James
    Participant

    Hello all,

    I have an issue with the above dishwasher. It is 3.5 yrs old and is used every day. The dishwasher is completing the cycle each time but I have noticed it isn’t heating or drying the dishes.
    From reading other posts on here I have tested the heating element resistance (I got 28 ohms at room temperature) is this normal? There are no fault codes either. I assume perhaps the temperature sensor is knackered?

    any assistance gratefully received.


    Daryl

    #466428
    electrofix
    Moderator

    28 ohm is about right. assume you disconnected wires to check it and measured from the connecter

    Dave

    #466429
    Daryl James
    Participant

    Hi Dave,

    Yes that’s exactly what I did. That being the case do you think it’s the temperature and turbidity sensor that’s likely to be at fault? Thanks 🙂

    Daryl

    #466430
    electrofix
    Moderator

    you need to measure the ntc value at temperature

    values come out at 9655 ohm at 10 degrees falling to 4850 at 25 degrees

    shows up as connection 3 and 4 on the turbidity connector

    Dave

    #466431
    Daryl James
    Participant

    Thank you Dave, I borrowed a multimeter to test the heating element so don’t have it anymore to test the terbidity and temp sensor unfortunately. I have ordered another sensor in case it is this part. If the machine doesn’t work when I install the new one what else could it be do you think?

    thanks,

    Daryl

    #466432
    electrofix
    Moderator

    the heater is controlled by a relay on the main board. not had one go faulty on these machines but its well possible as are dry solder joints on the board

    Dave

    #466433
    Daryl James
    Participant

    Thank you Dave I’ll take a look at those too and feedback

    #466434
    Daryl James
    Participant

    Where is the main board in this machine?

    #466435
    electrofix
    Moderator

    as far as I know at the back in a box in the centre of the machine

    Dave

    #466436
    Daryl James
    Participant

    I have now changed the temperature sensor and it still isn’t heating annoyingly! What should I try next?

    thanks,

    Daryl

    #466437
    Daryl James
    Participant

    Cancel my last comment ….. I had neglected to plug the heating element back in. Doh! All fixed and working now. Thanks Dave for your help!

    Daryl

    #466438
    Daryl James
    Participant

    The dishwasher did a full cycle and heated the water but ….. it didn’t dry ‍♂️ Any ideas?

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