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pressure on vaillant ecotec pro28 boiler?

I have a vaillant ecotec po 28 boiler in my new home, which produces gallons of hot water, but as son as I turn the heating on the pressure gauge goes through the roof! I followed the manual guide, and aparently the pressure is too high (2.2) even when the central heating is not turned on. Any ideas how I can remedy this?

ice maiden
November 2009
VaillantHeating, Home Heating SystemsVaillant Ecotec Boiler
I have changed the "diverter valve" using a qualified plumber and I have developed a similar problem. I tried reducing the pressure by draining the radiator as recommended by one of your readers but it still goes back to 2.8.

harry cox
December 2013
Thank you, i managed to reduce it to 1.4, but the pressure is still rising when i turn the ch on, (as is the water temperature?)

ice maiden
November 2009
Thank you, i manged to reduce it to 1.4, but the pressure is stll rising (as is the temprature?)

ice maiden
November 2009
2.2 bar is indeed high...bleed some water out from a convenient radiator bleed valve - it takes a while and you'll have to remove a pint or so but its the most boiler friendly way. When done - at around 1 bar - expect the pressure to rise to about 1.3 bar or close.

John
November 2009

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