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Worcester Bosch Heat Exchanger 35CDi II RSF 87161026750

Worcester Bosch

Worcester Bosch Heat Exchanger 35CDi II RSF 87161026750

Worcester Bosch gas to water heat exchanger, part 87161026750, for 35CDi II RSF combi boilers running natural gas or LPG.

At a glance

  • Part type: Gas to water heat exchanger
  • Also known as 1013973
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
87161026750
GC number
E80-443
Showing prices

£362.15

£301.79 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Worcester Bosch gas to water heat exchanger, part 87161026750, transfers heat from the burner's combustion gases into the water circuit of the 35CDi II RSF combi boiler. It sits in the flue gas path and forms the link between the combustion side and the domestic hot water and heating side of the appliance. It is supplied as a Worcester Bosch spare for the 35CDi II RSF family.

Signs this part needs replacing

  • Hot water runs lukewarm or the flow rate at the tap drops away
  • Kettling, banging or rumbling from the boiler during a heating or hot water demand
  • The appliance overheats, locks out or needs repeated resetting
  • Water weeping or staining around the heat exchanger body or its connections
  • Combustion readings drift outside the limits given in the boiler's service documentation

Before you order

  • Check the GC number on the appliance data badge against the list above before ordering.
  • Alternative part number 1013973 may appear on older documentation for the same component.
  • Inspect the heat exchanger gaskets and seals and replace them if they are disturbed during removal.
  • 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.