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bubbling boiler glowworm 24hx?

new installation fault 22 and fault f4 keep coming up.all rads heat no problem but when boiler reaches 62 degrees it starts boiling noise inside .its a sealed system with 1.5 bar pressure whats up with it brand new
neil, October 2009
blocked condensate pipework

paul the gasman, October 2009
link Click here to see other fixes for Glow-worm 24HX.