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Mend Ferroli Optimax HE 38C Home Heating Systems

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Mend Ferroli Optimax HE 38C He Keeps A1

How can I fix my ferroli optimax he 38c boiler, it keeps saying A1?

My boiler keeps saying A1 and my heating and hot water is now off?

Linzi
April 2011
FerroliFerroli Optimax HE 38CHeating, Home Heating SystemsHe Keeps A1
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