Ferroli 10L Cartridge Kit 3980I100

The Ferroli 3980I100 is a 10L cartridge kit, listed in the manufacturer's parts data as a flow meter for the Bluehelix Hitech RRT range. It forms part of the domestic hot water circuit, where the cartridge registers the flow of water through the boiler as a tap is opened. The signal it produces allows the appliance to recognise a hot water draw and start the DHW sequence.

• Hot water demand is not detected when a tap is opened, so the boiler does not fire for DHW
• Domestic hot water temperature fluctuates or runs hot and cold during a draw-off
• The boiler responds slowly or intermittently to hot water calls
• Debris or scale build-up inside the cartridge body affecting flow registration
• Water weeping from the cartridge housing or its seals

• Confirm your appliance is a Bluehelix Hitech RRT 24C or RRT 28C
• Check the model and GC number on the appliance data badge against the fitment list above
• Verify the part number 3980I100 on the component being replaced, where it is still legible
• Confirm whether the fault lies with the flow meter cartridge rather than the wider DHW circuit