Waste water reading wrong

Discussion in 'Tech/Mech General' started by SteveB123, May 17, 2016.

  1. SteveB123

    SteveB123 Funster

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    I have a 2014 Autotrail and the waste water tank is reading half full when it is empty. Any advice appreciated.
     
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  2. GJH

    GJH Funster Life Member

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    Probably needs a clean, or just get used to it :) Ours reads a quarter full when it's empty :)
     
  3. scotjimland

    scotjimland Funster Life Member

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    Dirty probes are the usual cause.. they work by conduction current though the liquid.. if they get dirty they can show a false level..

    wash out the tank and if possible clean the probes.

    They are generally mounted in the top of the tank.. can normally be unscrewed for cleaning, some are individual probes others can be on a cap

    this drawing shows them mounted on the side of the tank'

    [​IMG]
     
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  4. pappajohn

    pappajohn Funster Life Member

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    Take no notice of it.
    Even after cleaning the probes they will only get covered in crud and slime again.

    When water won't go down the shower plughole the tank is full....time to empty.
     
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  5. laurieash

    laurieash Funster

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    Mine has never worked properly from new 2013 autotrail.
    just ignore, when used all my fresh water I know that the waste needs emptying.
     
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  6. robnchris

    robnchris Funster

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    We also have a 2013 Autotrail, the Sargent readout over the door is a waste of space, we are on our third and it pretty much reads what it feels like, the fresh water level is spurious at best, some of the temp readings are amazing, it won`t even keep a time setting so we have just learnt to ignore it.
     
  7. sdc77

    sdc77 Funster

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    Like @pappajohn .. once the fresh waters gone .. the waste tanks nearly full
     
  8. old-mo

    old-mo Funster Extra Special Life Member

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    $hit on the sensor..... (y)

    I don`t mean that`s what you have to do.... :lipssealed: :giggler:

    But I suspect grease or summat that has been chucked down the sink has stuck to it.. :nod:

    Chuck a bottle of cheap steralizing fluid in the tank and leave over night.. (y)
     
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  9. rupert

    rupert Funster

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    hi on my AT there are two settings for waste level but only one sensor.
    the sensor is a small float fitted into the side of tank near the top easy to remove by loosening the large plastic nut. this nut squeezes the soft rubber sleeve and forms a seal .
    take it out and clean... the control panel can be configured to indicate one or two sensors.
    when panel shows waste level, hold setting button down for five seconds and it will display alternative sensor. hope you understand. mine is a 2004 model
    fresh water has the five sensors
     
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  10. WillH

    WillH Funster

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    The waste water level indicators are not very sophisticated, ignore them. After using your van for a while you get a grasp on how much water is in the FW tank and the WW tank and treat them as required. After all, you know how much is in the FW tank, you put it there, you also put all the WW in that tank. As one empties, the other fills.
     
  11. Tootles

    Tootles Funster

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    (Here we go).......Just run around with the tap half open.........:D:D
     
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  12. daveandsan

    daveandsan Funster

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    Just leave the Grey waste valve open. Sorted.:)
     
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  13. hilldweller

    hilldweller Funster Life Member

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    You irresponsible swine, go on kill bikers, destroy the eco system, make the ozone hole bigger, think of all the starving kids in Africa.
     
  14. Tootles

    Tootles Funster

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    Well, they could all run after the van if they wished......(y)
     
  15. scotjimland

    scotjimland Funster Life Member

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    Probably just me.. being a pedant but it was also my trade.. instrumentation.. so not working irks me.. just my training, it's ingrained.

    if it has a level gauge I want it to work.. and yes it's not sophisticated.. if you want sophisticated you need to install an ultrasonic transmitter .. but then you need to learn how to calibrate using a 4 -20ma calibrator.. why KISS is better for motorhome tank level.

    After cleaning it will last a season or more.. besides, don't put fat and grease into the grey tank and it won't foul up.. cleaned mine last April and it's still fine..

    By all means ignore.. your prerogative. the OP asked advice how to get it working..
     
  16. Jaws

    Jaws Funster Life Member

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    One of the BIG let downs to the Sargent systems is without doubt the random number generator they call a control panel !!
    I have had three so far ( through the trade and at no cost ) .. Three slightly different variations..
    All kept good time, all displayed a battery voltage between .2 and .4 volts down, all displayed both fresh and waste water levels at what ever the time of day/week it was being looked at ( in other words not exactly useful or meaningful information ! )

    Again, I believe the problems and issues are all down to a massively over complicated system and having taken a couple apart, a failure to use high stab resistors, pee poor chip sockets and cheap capacitors meaning to some extent the temperature ( both ambient and within the units ) and voltage regulation is far from great.

    I would say it really is a shame as the basic design is very sound and most of the major ( non discrete ) components are pretty darned good
     
  17. tonyidle

    tonyidle Funster

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    It irritates me that connected to the 'sophisticated' control panel is the same old unreliable stuff that has been used since Adam was a lad. The posh panels are simply another layer of unreliability. Like the AES fridge contrioller.
     
  18. Reallyretired

    Reallyretired Funster

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    Ours only gives an alarm when it's full, it's only gone off once so I know it works. I always empty the grey whenever I can, because although I travel with a full water tank whenever possible, I don't see the point in transporting a load of dirty water.
     
  19. Tootles

    Tootles Funster

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    Agreed. Our old Hymer control panel came out of a Sopwith Camel, but works fine! (y) Never gives a false reading. Also, we have a low fresh water sensor rod fitted in the water tank, with a warning light, but I think that's an after-market thing.
     
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  20. GJH

    GJH Funster Life Member

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    That's because you lost the key to wind it up.
     
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