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Worcester Bosch Diverter Valve Assembly Mixer Module 87161068450

Worcester Bosch

Worcester Bosch Diverter Valve Assembly Mixer Module 87161068450

At a glance

  • Part type: Diverter valve assembly / mixer module
  • Appliance family: Greenstar and Greenstar ErP
  • Also known as 1015099, N9101
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
87161068450
GC number
H02-533
Showing prices

£140.00

£116.67 ex. VAT · VAT at 20%

In stock
Cut-off passed — dispatches next working day
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Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Worcester Bosch mixer module diverter valve assembly is a hydraulic component used in Greenstar and Greenstar ErP boilers. It sits within the boiler's water circuit and directs the flow of heated water either into the central heating system or into the domestic hot water circuit. On a combi appliance this switching action is what allows the boiler to supply both heating and hot water on demand without a separate storage cylinder.

Signs this part needs replacing

  • Domestic hot water runs cold or only lukewarm while the heating circuit works normally
  • Heating circuit warms when only hot water is called for, or hot water is produced when only heating is demanded
  • Radiators stay cold while the boiler fires for a hot water demand
  • Diverter valve sticking, with the boiler cycling between heating and hot water modes
  • Reduced or inconsistent hot water temperature at the tap

Before you order

  • Check the GC number on the appliance data badge against the numbers listed for this part before ordering.
  • Confirm the model and serial number of the boiler, as this assembly is used across a large number of Greenstar and Greenstar ErP variants.
  • Check whether a gasket or seal kit is needed for the joint being disturbed during the swap.
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.