Low Pressure Problems on Worcester 28i Combi Boiler

Discussion in 'Plumbing and Central Heating' started by dhiggs1975, 30 Jan 2007.

  1. dhiggs1975

    Joined:
    30 Jan 2007
    Messages:
    6
    Thanks Received:
    0
    Country:
    United Kingdom
    I have recently moved into a new property but the Worcester 28i Combi boiler seems to have problems with pressure. The boiler works but the pressure has never gone above 1 and so is always below the recomended pressure.

    If I need hot water and the contiol is on the hot water only mode the pressure is not enough to provide hot water, unless the central heating control is set to on, then it is ok.

    I spoke to a friend and they recomended that I locate the pressure release valve and turn it until the pressure built up (item 10 on link)

    http://www.worcester-bosch.co.uk/index.php?fuseaction=product.detail&con_id=5052&detail_id=5793

    Problem is it will only turn one way and the pressure has gone down even more now. I also have "T" shaped key thingy that I am apparently supposed to use but not sure how and where

    Have I done the right thing but not enough or is there something else I need to do. I can't afford over £100 to get someone out just to turn the correct knob.

    Any help would be appreciated.
     
  2. cuttertree

    Joined:
    30 Jan 2007
    Messages:
    21
    Thanks Received:
    1
    Location:
    Clwyd
    Country:
    United Kingdom
    various solutions to this problem

    The t-shaped key goes in a hole on the underneath of the boiler located just to the left (facing). Put the key in so it is snug, twist a little. Some water may drip out but nothing to worry about. Next turn the pressure knob to increase the pressure. Go slight above what you require. 1.5-2.0 bar is the norm. Once achieved you need to turn the knob to the off position, careful as it is quite fragile and you can easily twist it off. Then remove key.

    Fingers crossed should be ok. If not check all radiator that there is no air in them, use your rad key for this.

    I had this problem last year, the above did work. Instructions on this should be in ur instruction manual. If you don't have it i can e-mail it.

    Good luck
     
    • Thanks Thanks x 1
  3. dhiggs1975

    Joined:
    30 Jan 2007
    Messages:
    6
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi

    I had a look for all these pipes when I got home last night, I can't seem to locate any of these pipes. All I can locate is one pipe which has a tap on it (similar to a garden tap). I can't see where the other pipes go due to tiles but I do not think it is behind them as it looks pretty permanent.

    Someone said that some combi boiler have all this internally, does this one?

    Thanks

    Dan
     
  4. dhiggs1975

    Joined:
    30 Jan 2007
    Messages:
    6
    Thanks Received:
    0
    Country:
    United Kingdom
    Would really appreciate if you could do that

    email is:

    dhiggs1975@yahoo.co.uk

    Thanks

    Dan
     
  5. cuttertree

    Joined:
    30 Jan 2007
    Messages:
    21
    Thanks Received:
    1
    Location:
    Clwyd
    Country:
    United Kingdom
    Under the boiler, below the dials etc there is a grill that pops out exposing the taps and hole for the t-shaped key
     
  6. dhiggs1975

    Joined:
    30 Jan 2007
    Messages:
    6
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi
    I can see where the key goes but I am not sure what it will do as its not really connected to anything. I can't see any taps though, apart from one that leaks water if you open it. (its black with a white mall connector.

    Many thanks for your help on this but I think I really starting to lose the plot on this, and may have to pay to get a plumber out
     
  7. DIYm1

    Joined:
    30 Jun 2006
    Messages:
    51
    Thanks Received:
    0
    Location:
    London
    Country:
    United Kingdom
    Hi

    I am not an expert and am still getting used to my combi boiler which is the same as yours (I am in the same situation as you as I moved into a new place some 6 months ago).

    This is what I have under my boiler to re-pressurise the boiler:
    http://www.worcester-bosch.co.uk/index.php?fuseaction=accessory.detail&con_id=5052&detail_id=6388

    I have not used it yet mind you, so cannot advise you. However, I believe that this accessory, called the charging link, is for the purpose of boosting the pressure of the boiler if you need to do this, e.g. after bleeding a radiator. From my reading of the manual, it connects the mains water pipe to the cold water pipework of the boiler internal system which needs to be kept at a minimum pressure to function efficiently and do what you need it to do.

    Like I said, I have not had to use it yet, but as the other writer said, the white key goes into the hole and somehow is kept there by a simple twist which I have not yet figured out. Then, there is a knob that you release to supposedly let water pass through the connection to boost the pressure. Obviously, you need to close the knob again before finally removing the key.

    Pls let me know of the outcome. I may need to carry out the same proceudre at some point as I have a radiator to bleed some time soon.

    Hope this helps
     
  8. dhiggs1975

    Joined:
    30 Jan 2007
    Messages:
    6
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi
    Many thanks, will try and let you know the outcome. when looking at the boiler I am geussing the pressure tap is the small white thing on the left.

    Whats do you rekon?

    Dan
     
  9. DIYm1

    Joined:
    30 Jun 2006
    Messages:
    51
    Thanks Received:
    0
    Location:
    London
    Country:
    United Kingdom
    I don't know... as I don't know what you have got although you seem to have the key
    My one looks like the picture in the link I gave you. The knob is black and is next to the T of the key - pls see picture in the link

    Good luck - I need to try it myself...
     
  10. cjb1971

    Joined:
    25 Mar 2006
    Messages:
    1,080
    Thanks Received:
    120
    Country:
    United Kingdom
    dont listen to your friend!!! as the name suggests the pressure relief valve will loose pressure out of the system-not top it up and once moved they usually then leak and a new one is required.
    Insert the filling key at bottom of boiler and twist lock it in position there should be a grey plastic hexagon head nxt to this,turn this to loose water into system-top it up to just over 1 bar
     
  11. DIYm1

    Joined:
    30 Jun 2006
    Messages:
    51
    Thanks Received:
    0
    Location:
    London
    Country:
    United Kingdom
    Dan
    As the last writer said, the knob i was referring to in my last comment is hexagonal and my one is white. It needs to be turned clockwise to fill the boiler internal system with mains water from the mains pipe (After locking the T Key into place to link the 2 pipes - This is if you have the charging link accessory that I have as per picture:

    http://www.worcester-bosch.co.uk/index.php?fuseaction=accessory.detail&con_id=5052&detail_id=6388

    Contrary to what I said last time, the white knob of the main accessory (Not the key) is next to the other end of the T of the key.

    I have tried to boost the pressure up today and I have managed it. Good luck to you!
     
  12. dhiggs1975

    Joined:
    30 Jan 2007
    Messages:
    6
    Thanks Received:
    0
    Country:
    United Kingdom
    You were all correct, I successfully done this last night.

    Many thanks all

    Dan
     
  13. Goodman

    Joined:
    2 Feb 2007
    Messages:
    5
    Thanks Received:
    0
    Location:
    Lancashire
    Country:
    United Kingdom
    :) Thank goodness at last
     
  14. mlskwsk

    Joined:
    19 Jul 2010
    Messages:
    1
    Thanks Received:
    0
    Location:
    London
    Country:
    United Kingdom
     
  15. davelx

    Joined:
    26 Sep 2006
    Messages:
    1,206
    Thanks Received:
    73
    Location:
    London
    Country:
    United Kingdom
    As it was a new property, surely you should been provided with the user documentation for the bolier - suggest you contact the builder and demand it!
     

Share This Page