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Mend Ferroli 1001 Central Heating Hot Water Boiler

Boiler set for DHW only,but CH also comes on Ferroli optima 1001?

The boiler is set for DHW only, recently even when hot water is not on demand , boiler switches itself on for CH. Can anyone help.Thanks

Joseph
September 2011

Ferroli Ferroli 1001 Heating, Home Heating Systems Central Heating Hot Water Boiler

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Ferroli 1001 Boiler - CH Coming On?