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Worcester Bosch Chamber Door Assembly 87186800770

Worcester Bosch

Worcester Bosch Chamber Door Assembly 87186800770

Chamber door assembly for Worcester Bosch Greenstar 12/18 and 18/25 oil boilers, part number 87186800770.

At a glance

  • Also known as 1022539
Manufacturer part no.
87186800770
Showing prices

£290.41

£242.01 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 Worcester Bosch chamber door assembly (part number 87186800770) is a component for specific Greenstar oil-fired boilers. It provides the access cover for the combustion chamber and seals the chamber during operation. This part is listed for the Worcester Greenstar 12/18 OOO GB OIL and Worcester Greenstar 18/25 OOO GB OIL models.

Signs this part needs replacing

  • Visible cracks, distortion or corrosion on the door or its sealing face
  • Combustion readings that cannot be set within the manufacturer's tolerances
  • Signs of flue gas leakage around the chamber door
  • Difficulty refitting the door or achieving a consistent seal after servicing
  • Physical damage to the door assembly or its fixings

Before you order

  • Confirm your boiler model is one of the two listed above.
  • Check the part number on the existing component or in the manufacturer's parts list.
  • Verify the appliance's serial number against Worcester Bosch's documentation.
  • Ensure the replacement is correct for your specific boiler variant.

Not sure which part?

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