Long shot - any central heating / boiler folk here?

1 reply
Found 3rd Dec 2007
Hopefully someone can give me some tips or guidance with this one.

Basical have a 10 year old Ariston EuroCombi boiler and all was working fine
until I took two rads of the wall to decorate.

The rads valves were closed off and no leaks occured during the two days
they were off. the heating worked normally.

Put the rads back on, filled them and bleed the whole system to ne sure.
Later taht day heating stopped working and the system pressure was down to
zero. Topped it up back to 1.5 bar as per aristons manual. Within about 20 -
30 mins the pressure was back to zero.

First thing I did was check the two removed rads for leaks. All dry.

Next I suspected the expansion vessel. I had had this loose pressure a few
years ago. An yes it was down to 5psi - should be about 15psi - 1 bar.

So today re-pressurised the expansion vessel with the system drained. And it
seemed a bit better but still would not rise above 1.5 bar system pressure
when running hot. Normally the system runs at 2.5 bar hot.

So today went out and got a new expansion vessl, fitted it and no
difference.

the system will just hold the 1.5 bar fill pressure, but does not rise upto
the normal 2.5 bar.

I guess I will have to leave it to go cold overnight to see what it really
does fall to, but before I call in a Corgi guy and have to pay top dollar is
therea nything else I can test / check?

thanks for reading

EliTom

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2 Comments

Hi EliTom
Theres a good forum with loads of help on this sort of thing at diynot.com
Would have put the link up but it seems to take ages to get posted
But if you go to the site and click on the forum and then click on the central heating section it should help

Original Poster

silk

Hi EliTomTheres a good forum with loads of help on this sort of thing at … Hi EliTomTheres a good forum with loads of help on this sort of thing at diynot.comWould have put the link up but it seems to take ages to get posted But if you go to the site and click on the forum and then click on the central heating section it should help



Cheers silk

registered and posted there - some replies already, but no real clue yet.

Anyone else here any ideas

Ta

EliTom
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