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Loss of pressure in Combi boiler

Discussion in 'Plumbing and Central Heating' started by Kantilal Tanna, 23 Mar 2015.

  1. Kantilal Tanna

    Kantilal Tanna

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    We have loss of pressure in Combi Boiler and stops working with a red light.
    We had heating Engineer who changed the diverter but the problem still remains.
    I have not noticed the fault code but I think it is F75.
    Can anybody kindly suggest what may be causing problem?
    I read several articles in forum but unsure what to do. Can anyone suggest an Engineer around Barnet area and how much would it cost as I have already paid £180. for just putting Diverter.
    Many thanks.
    Tanna
     
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  3. TeaTime

    TeaTime

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    Boiler make and model please.

    I assume you are noticing a full pressure drop on the pressure gauge on the front panel, not just a loss of half a bar?
     
  4. Tibbot

    Tibbot

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    How much will what cost? This isn't a clairvoyant's forum.
     
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  5. Kantilal Tanna

    Kantilal Tanna

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    Vailant ecoPro 28.

    At present when I press - key it shows 1.6 and gauge is middle of green.

    Hope this makes sense!

    Thanks[/b]
     
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  7. TeaTime

    TeaTime

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    So the pressure on the gauge seems fine but the boiler is in lock-out showing an error code of .....possibly F75?
     
  8. Kantilal Tanna

    Kantilal Tanna

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  9. TeaTime

    TeaTime

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    Sounds like the expansion vessel needs refilling / replacing IMO, but there might be some additional issues, which the boiler engineer will look into.

    Not sure about the cost, but others can advise.
     
  10. Kantilal Tanna

    Kantilal Tanna

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    Hello, once again, the Boiler Engineer came back and filled expansion vessel with foot pump but after a while water was still dripping outside the wall and he replaced another valve, probably PSV, it worked fine for half a day and same problem occurred. Showing red light, increased the water level twice, it worked fine for few days and now have same problem, though pressure stays in middle (green area). Do I need new expansion vessel? Or there is something else.

    Any help will be highly appreciated. Thanks.
    :unsure: :unsure: :unsure:
     
  11. DIYnot Local

    DIYnot Local

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    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

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