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thermoclassic f30/e plus losing pressure?

the above boiler is constantly losins pressure over a couple of days but there are no leaks on the heating circuit?????????

adam lyons
April 2008
are you losing water from the safety valve? (is the pressure when hot reaching above 3 bar?) if so the water loss is due to this and your problem will be an undercharged or failed expansion vessel

T
April 2008

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Mend repair fix F30 home heating systems