Combi Boiler Pressure

fmscoop · 9 Nov 2004

I have a baxi 105e combi boiler and the water pressure is constantly increasing until it hits 3 bar and the relief valve kicks in. I have disconnected the filling loop but it still increases in pressure. I have to manually release the pressure every day. Pressure rises even when system is turned off!! Please help! Thanks.

kevplumb · 9 Nov 2004

secondary heat exchanger is leaking internally

fmscoop · 9 Nov 2004

Hello mate, in the manual i can see a heat exchanger and a plate heat exchanger! Which is the secondary one???? Thanks.

PEDANTICVINDICTIVEMAN · 9 Nov 2004

Plate.

kevplumb · 9 Nov 2004

evening pedantic

PEDANTICVINDICTIVEMAN · 9 Nov 2004

Hi Kev

fmscoop · 9 Nov 2004

Thanks for your help guys i will get this sorted. I was told it may have been the expansion vessel, glad i havent bought one yet! Cheers.

kevplumb · 9 Nov 2004

expansion vessel wont raise the pressure if the boiler aint on
wont raise the pressure if it is just has nowhere to go

weargas · 9 Nov 2004

hey kev,
you had many of those? i've had stacks.

kevplumb · 9 Nov 2004

many of what weargas ?

kevplumb · 9 Nov 2004

wasnt being sarky marra just didnt read the question
no never come across it but we have hard water

fmscoop · 30 Nov 2004

Just a quick thanx to kev, boiler has had new secondary heat exchanger and is now running sweet. Cheers m8.

AnonymousImport · 30 Nov 2004

we try m8

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Combi Boiler Pressure

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