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Vaillant boiler pressure

Discussion in 'Plumbing and Central Heating' started by Just make it work, 1 Apr 2019.

  1. Just make it work

    Just make it work

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    Evening,

    Having some trouble with my Vaillant Ecotec Plus 418, which is showing a F22 error code - low water pressure. Sadly there isn't a filling loop that allows me to repressurise it.

    Does anyone know how I might get around this? When I reset it, it starts up but then winds down quite quickly. No noticeable problems in airing cupboard.

    Thanks!

     
    Last edited by a moderator: 2 Apr 2019
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  3. ianmcd

    ianmcd

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    Do you have a HW Cylinder somewhere? is there a small expansion vessel (usually red) if there is your filling loop will be there
     
  4. muggles

    muggles

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    This can also be caused by a faulty pump or air in the system
     
  5. Mottie

    Mottie

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    How was it filled up initially then?
     
  6. Just make it work

    Just make it work

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    Good question!
     
  7. Just make it work

    Just make it work

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    Thanks for the replies. Hoping the fault is the water pump so will be examining it more closely tomorrow.
     
  8. hertsboilers

    hertsboilers

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    Check the smaller head tank for water in the loft if you don't have a pressure gauge and filling loop.
     
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    DIYnot Local

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