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Mend Combi Boiler Pressure

COMBI BOILER PRESSURE?

MY COMBI BOILER SOMETIMES LOOSES PRESSURE. WHEN I TOP MY SYSTEM UP TO 1.5 BAR, EVERYTHING IS FINE FOR A DAY OR TWO. THEN, THE PRESSURE GOES UP T 3.5 - 4 BAR AND STARTS VENTING AT THE OVER FLOW. I THEN BLEED THE SYSTEM BACK TO 1.5 BAR AND THE CYCLE WILL START AGAIN. ANY IDEA'S

GARY B
November 2008
Heating, Home Heating SystemsCombi Boiler Pressure
Youwill need to change expansion vessel on boiler or
add another one into pipework if not possible to get at one onboiler.

plumbmend
November 2008
The expansion vessel has lost pressure or is knackered.Get an RGI in.

Gasman
November 2008

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