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Mend Not Up Boiler Keeps C

pressure on boiler keeps going up to over 3bar safety valve not c?

sabre 29he pressure keeps going up on gauge safetyvalve not coming into operation boiler still working ok have drained system down and refilled to 1.5bar switch on goes to over 3bar what could be problem be

john peden glasgow
May 2009
re-pressurise your expantion vessel

b
May 2009

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