User Tag List

Thanks Thanks:  0
Likes Likes:  0
Page 1 of 2 12 LastLast
Results 1 to 10 of 15

Thread: Noisy Boiler

  1. #1
    Regular Member crispy007's Avatar
    Join Date
    Oct 2010
    Location
    lincs
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default Noisy Boiler

    Does anyone know anything about heater boilers
    Mine fires up ok runs perfect for 15 mins then starts making this horrid noise
    It makes this noise for about 5 mins then goes of
    if when its making this horrid noise I turn the hot tap on or undo a bleed screw on the radiator it also stops
    Its a combi boiler about 9 years old I have been advised that it may be air in the system and it also needs some inhibitor of some sort
    thanks in advance for any help

  2. #2
    Regular Member HITFACTORY1403's Avatar
    Join Date
    Mar 2011
    Location
    NEWCASTLE UPON TYNE ( Shiremoor )
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    before i got to your last sentence i was going to say air lock .

    i have the opposite to you on my combi boiler ,

    when i run my taps , i can hear the pipes going ... clang clang for a short time .

    maybe , when you run the taps or undo your bleed screw on your combi , you are pushing through the air or letting the air out , thus causing the noise to stop .

    thanks , you have reminded me , that i need to bleed my radiators , as some are very hot and some are warm and one is cold .

    i hope you get it sorted ,

    sorry i can't be of much technical help .
    Last edited by HITFACTORY1403; 20th November 2011 at 11:07.

  3. #3
    Regular Member crispy007's Avatar
    Join Date
    Oct 2010
    Location
    lincs
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Quote Originally Posted by HITFACTORY1403 View Post
    before i got to your last sentence i was going to say air lock .

    i have the opposite to you on my combi boiler ,

    when i run my taps , i can here the pipes going ... clang clang for a short time .

    maybe , when you run the taps or undo your bleed screw on your combi , you are pushing through the air or letting the air out , thus causing the noise to stop .

    thanks , you have reminded me , that i need to bleed my radiators , as some are very hot and some are warm and one is cold .

    i hope you get it sorted ,

    sorry i can't be of much technical help .
    by what you have said its all pointing to an air leek

  4. #4
    Regular Member
    Join Date
    May 2009
    Location
    Norwich
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats


    Trim : SXi

    Engine : 2.2


    Default

    It sounds like cavitation in the pipes. The air cycles round with the water gets to the pump and the pump then chatters (cavitates)

    There should be a way of topping up the boiler but do this when its cold. Fire up the boiler and bleed out the rads. Some pumps have a bleed on them as well if yours does bleed it from here as well.

  5. #5
    Regular Member crispy007's Avatar
    Join Date
    Oct 2010
    Location
    lincs
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Quote Originally Posted by the_wave_rider View Post
    It sounds like cavitation in the pipes. The air cycles round with the water gets to the pump and the pump then chatters (cavitates)

    There should be a way of topping up the boiler but do this when its cold. Fire up the boiler and bleed out the rads. Some pumps have a bleed on them as well if yours does bleed it from here as well.
    we have a tap on our boiler to pressurise the system
    i built up the pressure to 1 bar yesterday and have noticed that the pressure has dropped down today (half way between 1 And zero)
    this would indicate that we have a leak somewhere
    would you agree with this

  6. #6
    Regular Member poves's Avatar
    Join Date
    Dec 2007
    Location
    lancashire
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Quote Originally Posted by crispy007 View Post
    we have a tap on our boiler to pressurise the system
    i built up the pressure to 1 bar yesterday and have noticed that the pressure has dropped down today (half way between 1 And zero)
    this would indicate that we have a leak somewhere
    would you agree with this
    My father in law is well clued up on stuff like this ( commercial heating engineer)
    I'll ask him later , but that pressure is definately too low mate .
    Can't remember the exact way it goes but it's something like 1 bar pressure will service a given distance of pipe of a specific diameter (a guess would be 20ft for every bar)
    I don't really know much more , sorry .

  7. #7
    Regular Member crispy007's Avatar
    Join Date
    Oct 2010
    Location
    lincs
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Quote Originally Posted by poves View Post
    My father in law is well clued up on stuff like this ( commercial heating engineer)
    I'll ask him later , but that pressure is definately too low mate .
    Can't remember the exact way it goes but it's something like 1 bar pressure will service a given distance of pipe of a specific diameter (a guess would be 20ft for every bar)
    I don't really know much more , sorry .

    Ok thanks for that mate

  8. #8
    Regular Member
    Join Date
    May 2009
    Location
    Norwich
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats


    Trim : SXi

    Engine : 2.2


    Default

    You need to be running more than 1 bar! Check around the pipes at the thermostats on the rads as there may be a small leak. You are obviously losing water somewhere for the pressure to drop

  9. #9
    Regular Member
    Join Date
    Jan 2010
    Location
    wirral
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    I'd say 1 bar in a combi is sufficient, although I'd opt for somewhere nearer to 1.5 bar (when the system is COLD). Also, check your overheat stat, if the boiler is running for a while and cutting out. The most obvious cause would be an airlock though, but with a combi being a sealed and pressurised system, this should be easily cured. As said, pressurise the system to 1.5 bar when cold and try bleeding all yours rads, also worth checking your auto air vent inside the boiler.

  10. #10
    Regular Member
    Join Date
    May 2009
    Location
    Norwich
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats


    Trim : SXi

    Engine : 2.2


    Default

    Most boilers won't even fire up at 0.5bar pressure. Modern day combi boilers run at around 1bar cold and upto 2bar when used. If the pressure is too high when the boiler is cold it will cut out when running or over pressurise.

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Boiler sorted !
    By bembo449 in forum The 'Off Topic' room
    Replies: 0
    Last Post: 22nd July 2011, 22:23
  2. Combi Boiler!
    By djr69uk in forum General Chat
    Replies: 16
    Last Post: 5th March 2011, 02:04
  3. Gas boiler broke? or is it?
    By spoons in forum General Chat
    Replies: 38
    Last Post: 22nd September 2010, 13:46
  4. Duff Boiler.....
    By macdad in forum General Chat
    Replies: 14
    Last Post: 23rd February 2008, 21:38
  5. Choosing a new Boiler
    By Brocks in forum General Chat
    Replies: 11
    Last Post: 28th March 2007, 23:15

Visitors found this page by searching for:

Nobody landed on this page from a search engine, yet!

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •