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Mend Vaillant ecoTEC plus 831 Boiler Home Heating

How can i resolve Vaillant ecoTEC plus 831 high pressure?

I have a Vaillant ecoTEC plus 831 which keeps going into the red of the pressure gauge despite almost daily bleeding of radiators.Can anyone suggest a solution,it is only a two bed house with temperature control on each radiator? The boiler is about 18-24 months old.

Lou
September 2008

Vaillant Vaillant ecoTEC plus 831 Heating, Home Heating Systems Vaillant Boiler Home Heating

Sounds like a problem with the pressure vessel... (similar stories on google). If it's still under guarantee, call Vaillant and get them to fix it.

Sheridan
December 2010

HEEELLLLLOOOOOO How did you resolve your issue we are having the same problem. Pressure is only rising when the heating is on... It's cold and we need the system to get sorted asap!!!!

Warmth
November 2010

Lou, I have the same problem. How did you fix it?

Trevor
October 2008

is filling loop passing mains cold into system water??????
may look shut off, but is it?

definately first check

questions.
does pressure only rise when using heating?

does it rise when boiler off?

rule out filling loop passing

iain
September 2008

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Vaillant ecoTEC 831 High Pressure - Fixes & Help