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Mend Ferroli He 31c Start

My Ferroli Optimax HE 31c wont start?

The fault diagnostics says "no cn", do you know what this means as there is nothing in the manual.

david jones
May 2010
FerroliHeating, Home Heating SystemsHe 31c Start
my gas went and i haven't been able to start the boiler since

kathryn blanche
November 2010
Dave not going to give you any technical help but if you search Ferroli on the above there is an answer to your question on the subject not too far back March, being replied to by a "ferroli" man, the method isn't in my book.Basically there is a pcb communication lock out hence 'Cn' he recommends a new modified board but gives a get out of jail method to effect an up and running 'til next time' solution.??

Guytawe
May 2010

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