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heatline combi boiler pressure in red?

from standby switching boiler on pressure risises slowly into red zone

model s24/s30 compact combi
bill vulcan, January 2010
either expansion vessel has lost its charge or more commonly with the heatlines the flexible hose from the hydroblock connected to the expansion vessel is blocked

tony white, May 2010
I have the same issue, if i bleed a radiator the boiler trips out and the LED displays low presure so i think its a faulty gauge... next mission to find a replacement!

Milo, January 2010
link Click here to see other fixes for Heatline.