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Low Pressure Problems on Worcester 28i Combi Boiler

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dhiggs1975

from United Kingdom

Joined: 30 Jan 2007
Posts: 6
Location: United Kingdom

PostPosted: Tue Jan 30, 2007 2:09 pm Reply with quote

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.
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cuttertree

from United Kingdom

Joined: 30 Jan 2007
Posts: 21
Location: Clwyd,
United Kingdom
Thanked: 1 time

PostPosted: Wed Jan 31, 2007 10:18 am Reply with quote

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
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The following user says thank you to cuttertree for this useful post:
phildrash (18 Nov 2010)
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dhiggs1975

from United Kingdom

Joined: 30 Jan 2007
Posts: 6
Location: United Kingdom

PostPosted: Wed Jan 31, 2007 10:25 am Reply with quote

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
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dhiggs1975

from United Kingdom

Joined: 30 Jan 2007
Posts: 6
Location: United Kingdom

PostPosted: Wed Jan 31, 2007 10:50 am Reply with quote

cuttertree wrote:
various solutions to this problem

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


Would really appreciate if you could do that

email is:

dhiggs1975@yahoo.co.uk

Thanks

Dan
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cuttertree

from United Kingdom

Joined: 30 Jan 2007
Posts: 21
Location: Clwyd,
United Kingdom
Thanked: 1 time

PostPosted: Wed Jan 31, 2007 2:15 pm Reply with quote

Under the boiler, below the dials etc there is a grill that pops out exposing the taps and hole for the t-shaped key
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dhiggs1975

from United Kingdom

Joined: 30 Jan 2007
Posts: 6
Location: United Kingdom

PostPosted: Wed Jan 31, 2007 2:20 pm Reply with quote

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
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DIYm1

from United Kingdom

Joined: 30 Jun 2006
Posts: 51
Location: London,
United Kingdom

PostPosted: Wed Jan 31, 2007 2:41 pm Reply with quote

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
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dhiggs1975

from United Kingdom

Joined: 30 Jan 2007
Posts: 6
Location: United Kingdom

PostPosted: Wed Jan 31, 2007 2:52 pm Reply with quote

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
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DIYm1

from United Kingdom

Joined: 30 Jun 2006
Posts: 51
Location: London,
United Kingdom

PostPosted: Wed Jan 31, 2007 3:59 pm Reply with quote

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...
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cjb1971

from United Kingdom

Joined: 25 Mar 2006
Posts: 1068
Location: United Kingdom
Thanked: 113 times

PostPosted: Wed Jan 31, 2007 6:47 pm Reply with quote

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
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DIYm1

from United Kingdom

Joined: 30 Jun 2006
Posts: 51
Location: London,
United Kingdom

PostPosted: Fri Feb 02, 2007 11:31 am Reply with quote

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!
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dhiggs1975

from United Kingdom

Joined: 30 Jan 2007
Posts: 6
Location: United Kingdom

PostPosted: Fri Feb 02, 2007 11:43 am Reply with quote

You were all correct, I successfully done this last night.

Many thanks all

Dan
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Goodman

from United Kingdom

Joined: 02 Feb 2007
Posts: 5
Location: Lancashire,
United Kingdom

PostPosted: Sat Feb 03, 2007 12:30 am Reply with quote

icon_smile.gif Thank goodness at last
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mlskwsk

from United Kingdom

Joined: 19 Jul 2010
Posts: 1
Location: London,
United Kingdom

PostPosted: Mon Jul 19, 2010 10:07 am Reply with quote

cuttertree wrote:
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
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davelx

from United Kingdom

Joined: 26 Sep 2006
Posts: 1116
Location: London,
United Kingdom
Thanked: 52 times

PostPosted: Mon Jul 19, 2010 12:31 pm Reply with quote

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!
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