Question about Bosch Nexxt Premium WFMC6400UC Front Load Washer

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Error 4 in bosch nexxt washer

Hi,

we set up our drainage in our washer through a 3/4 hose that drains directly to our main abs drain out to the septic system. the hose rises to about 7 feet above the floor, then 10 feet over to a wall and then down 1 foot to the abs drain. every thing was going fine for a year or so until we got some error 4 codes.

I've checked the septic line (drains fine), and cleaned out the 3/4 hose and the grey drainage hose that attaches to it...they were pretty blocked by soap.but got them cleaned out.....we are still getting the error 4 code though my wife claims it only happens on the 2+ load of the day.

we are wayyy out in the middle of nowhere, and getting a bosch repairman out here is expensive...any help, including up to replacing of computers/sensors would be appriciated.

thanks

Jay

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  • 3 more comments 
  • jay thornton Jan 17, 2008

    I'm thinking that too....I might install a pump, which would allow for a wash basin as well. So the experiment would not be a total "wash" (get it?)

    my only concern...why did it work fine for the first year...?

  • mrpoisse Jan 20, 2008

    I also get Err 4 when the program reaches the stage where it needs to drain. I hear a loud buzzing noise at first, then after 2 min or so, the Err 4 code appears. It looks like it does it every time we try to drain.

    In my case, the drain hose does not go higher than the height of the washer - I live at the 3rd story and the pipe goes straight down.

    I've tried cleaning the grey drain hose : there was some dirt in there, but not that much. My guess is that the building drain pipe is not blocked, since the water would overflow (my drain hose from the washer is just inserted in a bigger pipe in the wall, it is not thighly fitted).



    I'm wondering:

    - could the "internal drain pipe" - the one that is inside the washer - be blocked by dirt?

    - could the drain pump need repair?



    In both cases, what could be done before calling a repairman?

  • jay thornton Jan 21, 2008

    Lowered the hose by 10-12 inches and strapped it to a main drain line that slowly lowers to the wall where the input into the main drain line. My assumption is that this would be less height to push the water out and the straight downward path is easier to push water through than how the hose was draped slightly up and down through the strapping before.

    Result: it seems to be much better, although we still get an error if another major item is draining at the same time i.e. bath. I also checked the venting, and it's not blocked. And no, the septic is not backing up, and I've cleaned the front cleanout out. But I think this is indicating that with to much pressure, we get the error 4, and reducing the pressure will help.

    the next step is to drain it out the basement door as a test if we get the error in a no upwards pump scenario. if we do not get an error, I'll elevate the unit by 12-18 inches to cut down on the pumping, then if that does work, I'll install a wash basin with its own pump.


    I still have no idea why this is occurring 1 year after 1st install -
    the washer was 2 years old at the point of this installation (we
    moved), and from my understanding, most electrical motors degrade
    quickly after 1st few uses to about 90%, then stay fairly constant in power
    till eventual failure. The manual states it will pump up to 8 feet, although it
    does not specify from floor or from exit point. currently it is
    pumping up 7 feet from the floor.

  • jay thornton Jan 21, 2008

    correction: if the elevation does not work, then I''ll install a basin.

  • jay thornton Feb 04, 2008

    report back:

    lowering the drain line 1 foot solved the problem...if it reoccurs, I could also raise the units by 1 foot .

    still at a bit of a loss why this started happening after working fine for a year, but hey, it's working!

    thanks

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After browing a little more on this forum, I found the solution to my problem.
There was an hairpin stock in the rotating device that is located behind the front plastic cover.

Thank this website was very useful to me. Hope it can help someone else too!

Posted on Jan 20, 2008

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The problem here is that the waste pipe is rising to high up above the floor,, the top limit should be machine height ideally. The pressure built up by the water is not manageble by the drain pump.. in reality the waste water is acting as a blockage hope this helps


any questions dont hesitate to ask im here to help cheers got to go

Posted on Jan 17, 2008

  • Shaf Ahmed Jan 18, 2008

    Because it was new and had no wear...

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