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Dishwasher not heating water

Discussion in 'Troubleshooting and Repair' started by ANDYH, Nov 19, 2015.

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  1. ANDYH

    ANDYH

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    Nov 19, 2015
    Hi,
    My dishwasher is a Baumatic BWDI631 which runs through the cycle without heating at all. Ive measured the heater element at approx 30ohm so I think that's ok. During the cyle the voltage starts at 2V and goes up to 29V for the main cleaning part of the cycle. This sounds low to me, any help would be appreciated
    Thanks
     
  2. Martaine2005

    Martaine2005

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    May 12, 2015
    Hi Andy,
    The element sounds ok although on the high side. 30 ohms would be a maximum I would have thought.
    Have you checked the thermostat?

    Martin
     
  3. ANDYH

    ANDYH

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    0
    Nov 19, 2015
    Hi
    Not sure where the thermostat is located! There's a small unit on the output of the water heater which could potentially be a thermostat; this is wired in series with the supply to the heater
    Andy
     
  4. Martaine2005

    Martaine2005

    2,680
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    May 12, 2015
    That sounds about right. Although most I have fixed, the thermostat is near the bottom or underneath.
    Sorry, I didn't check your model. I will have a look and see where it is located.
    Give me ten mins.

    Martin
     
  5. Martaine2005

    Martaine2005

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    May 12, 2015
    Does that unit you can see resemble this part?

    [​IMG]
     
  6. ANDYH

    ANDYH

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    Nov 19, 2015
    Not really! I'm just trying checking the voltage between the input to this unit and the output of the heater (in effect taking it out of circuit) to see if this is limiting the supply to the heater which I would expect to be up around 240V at full power
     
  7. Martaine2005

    Martaine2005

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    May 12, 2015
    Andy, did you test the thermostat with a meter?

    Martin
     
  8. ANDYH

    ANDYH

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    Nov 19, 2015
    I'm not sure that I'm actually looking at the thermostat but its open circuit. I was hoping that with it in effect out of circuit, as per my last thread, I might get a higher voltage across the heater but still only 29V
     
  9. Martaine2005

    Martaine2005

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    May 12, 2015
    Are you laying on your back with the plinth off the machine? The thermostat will be a small metalic can with two wires.Like I posted earlier, but the wires may be red or blue or tartan. It is underneath.
    The heating element normally has 240v on the live side to chassis.

    Martin
     
  10. ANDYH

    ANDYH

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    Nov 19, 2015
    I've even had the dishwasher on its side with the bottom off and I can't see anything that looks like the thermostat. Ive also had the left hand cover off and I still can't find it! Any more ideas as to its location? Possibly under the right hand side cover?
     
  11. Martaine2005

    Martaine2005

    2,680
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    May 12, 2015
    Andy, how about posting some pictures here. I can't find the service manual for yours.
    Just a clear photo of the part you think is the thermostat and a good shot of underneath!.
    I am sure we can sort out where the hidden treasure is!'
    Just for fun, take the right side off too. Sods law it will be looking at you!

    Martin
     
  12. ANDYH

    ANDYH

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    Nov 19, 2015
    I'll take some photos but may need to put the left hand cover back on first or I could be left with a lot of screws!
     
  13. Alec_t

    Alec_t

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    742
    Jul 7, 2015
    Does this help?
    Dishwasher.PNG
     
  14. ANDYH

    ANDYH

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    Nov 19, 2015
    Pictures of the bottom of my dishwasher. Any ideas as to where the thermostat might be would be very welcome
     

    Attached Files:

  15. Bluejets

    Bluejets

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    Oct 5, 2014
    Looks like this...........(Google is a big help)
     

    Attached Files:

  16. ANDYH

    ANDYH

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    Nov 19, 2015
    Really can't see anything like that either underneath or on LHS of dishwasher
     
  17. Tha fios agaibh

    Tha fios agaibh

    2,088
    699
    Aug 11, 2014
    Look for wires going into the insulation on the upper portion of dishwasher.
    It is likely buried under that insulation material.
     
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