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ferroli spa model modena 80 e?

my h0t warter runs boileing hot for short time then boiler shuts and runs cold for a short time it then keeps repeteing above cycles
b jones, January 2010
sounds like hw sensor if you see the burner cut off while hw tap on .advise to change both ch and hw sensors at same time as two comes in a pack

ferrroli engineer, January 2010
link Click here to see other fixes for Ferroli.