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Mend Halstead Boiler Combi Leak

whats causing my Halstead combi boiler to lose pressure via the overflow?

I have an old halstead combi boiler, about 10 years old i think, which keeps losing pressure. I have checked everywhere for leaks and none found. The boiler overflow just keeps flowing? can anyone help please?

Gary
June 2012
Is that an easy fix for a novice and is it expensive?

Gary
June 2012
pressure relief valve passing
needs replacing

AWOL
June 2012

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