Worcester Greenstar 24i Boiler pressure problems...

BertieUK

We have the following boiler fitted to our Bungalow.

Worcester GREENSTAR 24i JUNIOR Combi MK III Condensing boiler.

The boiler was fitted new in September 2009 and has been serviced annually since.

Since its last service it has on the odd ocassions lost most of its pressure totally, central heating piping has been checked and no leaks have been found. When having to top up the pressure I do this to 1bar, the boiler/central heating runs ok for a couple of days then the pressure will start to vary.

This morning it started of as normal at around 1.2bar for a period of a couple of hours we are now looking at a pressure of 2.5bar.

Occasionally I have noticed water outside under what appears to be the pressure release valve pipe.

Any advice regarding this problem PLEASE.

popeye2755

The expansion vessel is probably faulty or needs pumping up. This will cause the PRV to open, thus the loss of pressure.

fannyadams

ice is forming on a pipe outside and making the biler have breathing difficulties. go outside with a kettle and defrost the pipes especially the one that looks like an overflow pipe.
get the man out to sort the outside pipes so that they drain away with a proper 'fall' rather than have any curves in them.

macman

The problem that OP has is with the PRV or EV-nothing to do with a frozen condensate pipe! And a condensing boiler does not take in air through the condensate pipe either-that's what the sealed flue is for.

BertieUK

macman wrote: »

The problem that OP has is with the PRV oe EV-nothing to do with a frozen condensate pipe! And a condensing boiler does not take in air through the condensate pipe either-that's what the sealed flue is for.

I have just released the pressure via the bathroom radiator valve from almost 3bar down to 1.2bar and now the boiler is breathing better. We will now 'phone the Service Engineer to check and fix the fault.

Thank you all for your help.

diywhynot

BertieUK wrote: »

We have the following boiler fitted to our Bungalow.

Worcester GREENSTAR 24i JUNIOR Combi MK III Condensing boiler.

The boiler was fitted new in September 2009 and has been serviced annually since.

Since its last service it has on the odd ocassions lost most of its pressure totally, central heating piping has been checked and no leaks have been found. When having to top up the pressure I do this to 1bar, the boiler/central heating runs ok for a couple of days then the pressure will start to vary.

This morning it started of as normal at around 1.2bar for a period of a couple of hours we are now looking at a pressure of 2.5bar.

Occasionally I have noticed water outside under what appears to be the pressure release valve pipe.

Any advice regarding this problem PLEASE.

If it is the EV, in some cases the boiler needs to be removed from the wall for the EV to be replaced. Very expensive. :eek:Alternatively a separate EV can be fitted. See the installation manual p.53 for details.

BertieUK

diywhynot wrote: »

If it is the EV, in some cases the boiler needs to be removed from the wall for the EV to be replaced. Very expensive. :eek:Alternatively a separate EV can be fitted. See the installation manual p.53 for details.

I would suspect that the Engineer would plump for the latter suggestion and fit an alternative second vessel of at least the capacity of 7lts close to the boiler.

The exit flue on this Worcester is fitted directly above the boiler through the wall to the outside.

Cheers...

One additional point is that we are just about to put the Bungalow onto the property market 'For Sale' and want everything to be operating properly.

diywhynot

BertieUK wrote: »

I would suspect that the Engineer would plump for the latter suggestion and fit an alternative second vessel of at least the capacity of 7lts close to the boiler.

The exit flue on this Worcester is fitted directly above the boiler through the wall to the outside.

Cheers...

One additional point is that we are just about to put the Bungalow onto the property market 'For Sale' and want everything to be operating properly.

:TRefreshing to see someone who doesn't want to burden the new owner with a boiler repair.

Btw good luck with your sale. Are you going with a traditional estate agency or are you going to try and sell it yourself via an online company?

BertieUK

diywhynot wrote: »

:TRefreshing to see someone who doesn't want to burden the new owner with a boiler repair.

Btw good luck with your sale. Are you going with a traditional estate agency or are you going to try and sell it yourself via an online company?

Many thank's for your comments we are the type of people that want to leave a property the way we would like to walk into our next. A big ask I know.:)

If you wish to look on the thread contained within House buying, renting & Selling.. When you have a moment the full story is there for you to read. Thanks again and all the best to you and yours.

https://forums.moneysavingexpert.com/discussion/4437699

unclebulgaria

diywhynot wrote: »

:TRefreshing to see someone who doesn't want to burden the new owner with a boiler repair.

+1

Before you go replacing or fitting new, make sure the existing vessel is checked for pressure loss. It may just need re-pressurising.
You can check this yourself, operate the air valve on the expansion vessel, if water shows its kaput, if just air its a good chance the vessel has just lost pressure and nothing else.
Filling back up must be done with the boiler completely empty.

BertieUK

unclebulgaria wrote: »

+1

Before you go replacing or fitting new, make sure the existing vessel is checked for pressure loss. It may just need re-pressurising.
You can check this yourself, operate the air valve on the expansion vessel, if water shows its kaput, if just air its a good chance the vessel has just lost pressure and nothing else.
Filling back up must be done with the boiler completely empty.

I called the Engineer that looks after our boiler and gave him the symptoms and he said that it was probably the vessel needs re-pressurising and said to climb ontop of the worktop and connect the car pressure guage to the red valve on the top....

..I said that I would rather he came to do it just in case it was something else but he is almost sure because of the boilers symptoms, we will be so relieved if it is what you both say that it could be. Have a nice weekend.