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my bar gauge is reading 2.2 bar how do i get it down?

i have a ferroli optimax he 31c and the bar gauge is reading 2.2 bar how do i get it down without blowing up my house
jay, October 2011
you only check the bar when system is COLD

A1, October 2011
bleed water out of radiator using a vent key, the pressure gauge will drop after a couple of pints are removed.

wirecutterman, October 2011
link Click here to see other fixes for Ferroli.