Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Hanicks
Basket
Worcester Bosch Code Plug 1139 NG

Worcester Bosch

Worcester Bosch Code Plug 1139 NG

Code plug 1139 for Worcester Bosch Greenstar 28I Junior Mk5 and Combi boilers, supplied in NG specification.

At a glance

  • Also known as 1020416
Manufacturer part no.
87144311390
GC number
J08-376
Showing prices

£10.54

£8.78 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 code plug 1139 is a small configuration plug used on the Greenstar 28I Junior range of combi boilers. It is fitted to the appliance's control board to set the boiler's operating configuration. This version is supplied in NG (natural gas) specification.

Signs this part needs replacing

  • The boiler fails to fire or runs with an incorrect gas configuration after board work
  • Fault codes relating to appliance configuration or gas type appear on the controls
  • The plug is missing, loose or damaged in its board socket
  • The boiler has been converted between gas types and the plug does not match the installation

Before you order

  • Confirm your appliance model against the fitment list above
  • Check the gas type of your installation — this plug is the NG version
  • Inspect the existing code plug and its board socket for damage before ordering
  • Have the boiler's model and GC number to hand when checking compatibility

Not sure which part?

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