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Worcester Bosch Heat Exchanger WB6 Assembled 8716117040

Worcester Bosch

Worcester Bosch Heat Exchanger WB6 Assembled 8716117040

ConditionNew

At a glance

  • Part type: Heat exchanger
  • Appliance family: Greenstar i ErP
  • Also known as WB8716117040, 1031123, N9005-1
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Hanicks code
8716117040
Manufacturer part no.
8716117040
GC number
J25-221

The Hanicks code is specific to the selected condition. Manufacturer part no. and barcode are shared by every condition.

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£562.90

£469.08 ex. VAT · VAT at 20%

In stock
Delivery
In stock. Order by 4pm Mon–Fri, 10:30am Sat for same-day despatch. Standard delivery usually takes 2-3 working days (Royal Mail Tracked 48).
Hanicks code
8716117040
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Worcester Bosch WB6 heat exchanger assembly (part 8716117040) is the main heat transfer component used across the Greenstar i ErP system boiler range. It takes heat from the combustion gases and passes it into the system water that serves the radiators and the domestic hot water circuit. Supplied as a complete assembled unit, it is intended as a direct replacement for the original component when the existing exchanger has failed or become contaminated.

Signs this part needs replacing

  • Heating or hot water output drops and cannot be traced to the pump, diverter valve or controls
  • Kettling, banging or gurgling noises from the boiler while it is firing
  • Repeated lockouts or overheat trips as heat transfer falls away
  • Visible scale, corrosion or staining around the exchanger body or its connections
  • Combustion readings that drift outside the manufacturer's stated tolerance

Before you order

  • Check the appliance model and GC number against the compatibility list before ordering, as the same boiler name can appear with different gas types.
  • Confirm the number on the existing component matches 8716117040 or one of the alternative numbers listed below.
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.

Not sure which part?

Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.