Worcester Bosch Return Unit Greenstar i ErP 8716117424

The Worcester Bosch return unit (part 8716117424) is a hydraulic spare belonging to the diverter valve and manifold group of the Greenstar i ErP combi range. It sits within the boiler's water circuit, directing return flow through the manifold assembly so that domestic hot water and central heating demands are handled correctly. It is supplied as a single replacement component for service and repair work on the affected appliances.

• Domestic hot water runs cold or fluctuates while the central heating continues to work
• The boiler fails to switch cleanly between heating and hot water modes
• Water weeping, staining or residue around the manifold and return assembly
• Repeated lockouts or fault codes linked to the hydraulic circuit
• Noisy operation or restricted flow on the return side of the boiler

• Check the GC number on the appliance data badge against the list above before ordering.
• Confirm the alternative number 1031281 matches the component being replaced.
• Inspect the seals and gaskets on the manifold during removal and replace any that are worn.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.