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Worcester Bosch Wiring Harness Main SMPS Highflow FS 8716118471

Worcester Bosch

Worcester Bosch Wiring Harness Main SMPS Highflow FS 8716118471

Worcester Bosch main SMPS highflow FS wiring harness, part 8716118471, for Greenstar FS 30CDi and 42CDi ErP regular boilers.

At a glance

  • Part type: Cables, leads and wiring harnesses
  • Also known as 1031258
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
8716118471
Showing prices

£64.68

£53.90 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

This is the main SMPS highflow FS wiring harness supplied by Worcester Bosch for its Greenstar FS range of floor-standing regular gas boilers. The harness carries the low-voltage supply and signal connections between the switched-mode power supply board and the rest of the appliance's electrical assembly, so the control board, fan and ignition sequence receive the correct voltages during a demand for heat. It is a direct replacement item for the original lead fitted at manufacture.

Signs this part needs replacing

  • The boiler fails to power up or drops out intermittently with no obvious fault elsewhere.
  • Repeated lockouts or error codes traced to the power supply or control circuit.
  • Visible damage to the loom: chafed insulation, scorched or discoloured conductors, or a brittle, cracked connector housing.
  • Loose or corroded pins at the harness plugs, causing unstable readings or intermittent fan and ignition operation.
  • A harness that has been disturbed or stretched during earlier work and no longer sits correctly on its routing clips.

Before you order

  • Check the GC number and model on the appliance data badge against the compatibility list, as the FS 30CDi and FS 42CDi regular ErP variants use different GC numbers.
  • Confirm the part number on the existing harness or in the manufacturer's parts listing before ordering, and note the earlier 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?

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