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Mend Ferroli Optimax HE 31C Boiler Heating

f21 error message on ferroli optimax he 31c boiler?

f21 error message appears after running central heating on a ferroli optimax he 31c boiler

ERIC
February 2011
FerroliFerroli Optimax HE 31CHeating, Home Heating SystemsBoiler Heating Ferroli
To much pressure in the system,release the pressure to 1bar by bleeding a radiator.If you release to much pressure recharge system to 1 bar.

David Jarvis
February 2012

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