Help Truma dumping water

Discussion in 'Heating and Air-Conditioning' started by orridge, Dec 24, 2015.

  1. orridge

    orridge Funster

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    Hi

    Just filled up with water in preparation for our trip to Germany leaving Boxing day and with the water pump on the Truma boiler is dumping all the water.

    The push/pull valve is in the closed position and the temperature should is above 8 degrees currently, we have a C3402 and I have put the heating on to see if that fixes the problem but any helpful suggestions would be greatly appreciated.
     
  2. GJH

    GJH Funster Life Member

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    Do you also have a yellow manual lever like the one in the diagram? If it is in the horizontal position (as it should be) try opening it and then closing it the other way. Sometimes they don't close properly.
     

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  3. Red Dragon

    Red Dragon Funster

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    Hi you also have a frost protected valve some have a blue knob on the top of a black casing whch has a small button on or near its base that must be pushed in and remain in,it can be in colder area of your MOHO i.e. under the kitchen sink check that this is in.
     
  4. Lenny HB

    Lenny HB Funster

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    Common problem is the air vent valve in the "T" connector at the top of the heater where the hot water outlet is.

    Leisure Shop Direct stock them.


    Obviously too late to get one for Boxing day, may get away with cleaning it, take it apart and soak in a 30%-50% solution of hot water and white vinegar (white wine vinegar works best).
    If it is the valve & cleaning doesn't work should be easy to pick one up in Germany, I think the same valve fits all the Truma combi's.
     
    Last edited: Dec 24, 2015
  5. DP_JAY

    DP_JAY Funster Life Member

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  6. orridge

    orridge Funster

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    thanks all, just back from Sons nativity.

    @Graham it's the push/pull type

    @Lenny thanks will have a look at that

    The push/pull valve seems to be working ok as when it's open it dumps what but when it's closed and the water pump is on it also dumps the water.
     
  7. orridge

    orridge Funster

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    I have a red valve by the boiler but I am at a loss to find a blue valve anywhere. Have checked all the cupboards but nothing.

    It's a Euramobil A Class so even had a look under the floor.
     
  8. Red Dragon

    Red Dragon Funster

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    frostcontrol_overview.jpg.jpg Thats the frost protection valve normally sited very close to the boiler
     
  9. Lenny HB

    Lenny HB Funster

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    That is because you don't have one. The blue is the latest mechanical dump valve on the C4 & C6 Combi's, earlier versions C6000, C 6002 etc., had a red electrically operated dump valve.
     
  10. orridge

    orridge Funster

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    yes I think I only have the red version and even in the closed position still dumping water with the pumps on.
     
  11. Techno

    Techno Funster Life Member

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    If you can't get a replacement valve I would remove the pipes and fit a though connector as an emergency fix
     
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  12. GJH

    GJH Funster Life Member

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    I would have another look for the yellow manual one. We have both on our van.
     
  13. orridge

    orridge Funster

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    I am not sure if it's related but we are getting minimum water out of the taps when the boiler is dumping water with the pump running. If the valve is in the up (closed) position how can the water get out when the pump if running but not when it is not running ?
     
  14. Techno

    Techno Funster Life Member

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    How about sticking a cork up the pipe under the van
     
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  15. Lenny HB

    Lenny HB Funster

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    Check and make sure which pipe the water is flowing out of under the van, there should be a two pipes one for the dump valve and one for the vent valve. I'm betting on it being the vent valve where the hot water draw off is.
     
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  16. f6c

    f6c Funster

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    Your right lennyhb.
     
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  17. orridge

    orridge Funster

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    You are correct Lenny the water is coming from the Vent pipe when then pump is running. I will try your suggestion about cleaning it in the morning. Thanks
     
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  18. Lenny HB

    Lenny HB Funster

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    Good news, it is only there to vent air out of the boiler while filling, should be able to clamp it off as a tempory fix.
     
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  19. f6c

    f6c Funster

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    Spot on:xThumb:
     
  20. orridge

    orridge Funster

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    do I just clamp it above the valve ie the clear plastic tubing.
     
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