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home Fix label Heating label_important Home Heating Systems category Ferroli

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
home Fix label Heating label_important Home Heating Systems category Ferrolidone
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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