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Worcester Bosch Earth Wiring Harness 1 87186812820

Worcester Bosch

Worcester Bosch Earth Wiring Harness 1 87186812820

Earth wiring harness (part 87186812820) for Worcester Bosch Greenstar FS and Highflow gas boilers.

At a glance

  • Also known as 1022636
Manufacturer part no.
87186812820
GC number
H71-351
Showing prices

£0.53

£0.44 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 Earth Wiring Harness 1 is a wiring component manufactured by Worcester Bosch for use in Greenstar gas boiler appliances. It provides the earth connection within the boiler's electrical harness, forming part of the appliance's earthing and safety circuit. It is listed under the wiring category of Worcester Bosch gas boiler spares.

Signs this part needs replacing

  • Earth continuity cannot be confirmed when tested on the harness
  • Visible damage, chafing or heat marking on the harness wiring
  • Corroded, loose or discoloured earth terminals and connectors
  • Intermittent electrical faults or unexplained boiler lockouts
  • Harness connectors that no longer seat securely on their terminals

Before you order

  • Confirm your appliance model against the fitment list above
  • Check the part number marked on the existing harness matches 87186812820
  • Identify whether your appliance is the NG or LPG variant
  • Inspect the harness routing and connectors before fitting to confirm the fault lies with the harness

Not sure which part?

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