Beko DW686 Not heating the water

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  • February 28, 2015 at 6:01 pm #84246
    Fintheshark
    Participant

    I have checked the flowthrough heater and it is OK, I have checked the heater relay in the PCB and it is OK and replaced the temp sensor and it still wont heat the water. I have extensively tested it and found that the PCB does produce 23O volts to the heater for about 5 seconds and then drops the relay out. It seems like the PCB must be looking to ensure flow and then drops out the relay for safety. The spray pump is running fine and the valve and microswitch under the spray arm is also working correctly. Everything else seems to be working except it doesn’t heat up.

    March 1, 2015 at 9:22 am #425184
    electrofix
    Moderator

    Re: Beko DW686 Not heating the water

    if you get 240v to the heater for 5 secs it might only be a back feed as the machine fills.
    according to fault finding on this machine you have checked the lot

    sounds like a main board fault but you say you have checked the relay but relays fail as thay are a mechanical device

    have you checked wiring as wires can break ?

    also during testing make sure you select a quick programme and listen for the dispenser opening then the unit should start heating

    Dave

    March 1, 2015 at 10:57 am #425185
    Fintheshark
    Participant

    Re: Beko DW686 Not heating the water

    Yes the soap dispenser is opening and i have already replace the heater relay and checked the 12v DC supply to it which comes in for 5 seconds and then drops out on every programme. I think the back feed that is missing is from the main spray motor which has a fancy PCB built into it but I am not sure what it does. The main PCB is £35 and the motor is £85 so by the time I replace everything I am third of the way to buying a new one with a warranty.

    March 6, 2015 at 8:23 am #425186
    Seamy
    Participant

    Re: Beko DW686 Not heating the water

    Check NTC & wiring to it.

    :eeek: please don’t do live testing :eeek:

    March 7, 2015 at 1:41 pm #425187
    Fintheshark
    Participant

    Re: Beko DW686 Not heating the water

    Thanks for your help, it was one of the thin blue wires to the thermistor that had broken as it passes through the door where it pivots.

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