my boiler is a saunier duval 24e . it will run for several days properly ? then build up pressure up to nearly 4bar then show 05 or 06 it does reset but goes problematic then resettles back down thanks
does the boiler discharge water from the pressure release pipe (safty feature on sealed systems).
As for the increase in pressure it could be the expansion vessel does the pressure rise when boiler is operating?
