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Heat Exchanger repair

Discussion in 'Plumbing and Central Heating' started by RichA, 6 Jun 2019.

  1. RichA

    RichA

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    My boiler was removed and re-fitted after some building works.

    It has now developed a fault after a couple of weeks of being re-commissioned; the problem is due to a faulty air admittance valve on the heat exchanger.

    My builder will likely arrange for his heating engineer to fix, but keen to ensure that I am not overpaying to fix.

    Is this typically a costly repair? Any ideas on what parts & labour will be for this.

    Many thanks.
     
  2. ianmcd

    ianmcd

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    A boiler does not have an air admittance valve as you call it , it does have an AAV Automatic air vent, this is the problem with google, two completely different things, and both work in opposite ways, not an expensive part and a very easy job to replace
     
  3. bernardgreen

    bernardgreen

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    Come on The problem is not in the search engine, it is people using acronyms instead of taking the effort to type the words in full.
     
  4. FiremanT

    FiremanT

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    Try this one: BGIAD

    Generally, if one understands the subject, the context will indicate the meaning if the acronym. And I am never going to write stuff out in full, unless I am writing to someoe who would not be expected to understand.
     
  5. bernardgreen

    bernardgreen

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    Do you expect a person asking for advice on a DIY forum to understand the difference between an AAV and an AAV ?
     
  6. RichA

    RichA

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    Apologies for the mix up (I quoted my builder; but didn’t know better myself).

    What would be a reasonable labour cost for replacing? £100? Does it require a full drain down? He mentioned freezing pipes, etc.
     
  7. muggles

    muggles

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    You've clearly never replaced one on an Isar :p
     
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  8. muggles

    muggles

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    Depends on what boiler you have. Some are easy and quick to do, some are a real pain to get at (I mentioned the Isar above - that and its sister boiler the Icos are a pig to get to). It also depends on whether it's seized in or not
     
  9. ianmcd

    ianmcd

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    No Benny boy the problem is why someone would think you would fit a plastic drain onto a heat exchanger, to let air in ? maybe he thought they were going to flush it :LOL::LOL:
     
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  10. ianmcd

    ianmcd

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    I have used that tool from Regin on those it makes it a lot easier.
     
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  11. ianmcd

    ianmcd

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    Doesnt require draining down, just a release of the pressure in the boiler,as above what make and model of boiler do you have ? sorry I never quote on costs on here, but someone will once you tell us what boiler you have
     
  12. RichA

    RichA

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    Thanks. It is a Worcester Bosch (I think a Greenstar 30i)
     
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  13. ianmcd

    ianmcd

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    If it is then its a very easy job
     
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