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    Ferroli F30 pressure problem, 1.5 to 3.0 bar & then 0bar

    hello - hope you can help, we have a Ferroli F30 boiler (14mths new) that normally shows 1.0 to 1.5 bar on the front-panel gauge when CH is cold. When CH is running this eventually increases to 3.0 bar when the pressure relief valve operates (read the manual!) and we see water dripping out of...
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