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home Fix label Heating label_important Home Heating Systems category Ferroli

Ferroli Optimax 31c?

Our boiler has a "no cn" symbol appearing on the clock counter and won't turn on. There is gas within the house. Leaflet doesn't cover that code. Can anyone tell me what the code stands for, or how to get the boiler get back on?
Gillian, September 2010
home Fix label Heating label_important Home Heating Systems category Ferroli
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