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Worcester Bosch Wiring Harness Single Red 87161131520

Worcester Bosch

Worcester Bosch Wiring Harness Single Red 87161131520

Single red wiring harness for Worcester Bosch Greenstar Heatslave External 12/18, 18/25 and 25/32 boilers.

At a glance

  • Also known as 1021851
Manufacturer part no.
87161131520
Showing prices

£4.81

£4.01 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 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 WIRING HARNESS SINGLE RED is a Worcester Bosch electrical harness for the Greenstar Heatslave External boiler range. It forms part of the appliance's internal wiring, connecting the single red circuit within the boiler's electrical layout. The manufacturer part number is 87161131520.

Signs this part needs replacing

  • Intermittent electrical faults or the appliance failing to fire when no other cause is evident
  • Visible scorching, burning or discolouration on the harness or its connectors
  • Brittle, cracked or frayed insulation along the harness wiring
  • Loose, corroded or heat-damaged terminals where the harness plugs in
  • Faults traced to a broken or high-resistance conductor within the harness

Before you order

  • Confirm the appliance is one of the Greenstar Heatslave External variants listed above
  • Check the part number on the existing harness against 87161131520
  • Inspect the harness connectors and routing so the correct single red harness is ordered

Not sure which part?

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