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Worcester Bosch Air/Gas Mixing Chamber Assembly MIDI 87167637000

Worcester Bosch

Worcester Bosch Air/Gas Mixing Chamber Assembly MIDI 87167637000

Air/gas mixing chamber assembly for Worcester Bosch Greenstar 24 FSN-GB and 28 FSN-GB Combi NG boilers.

At a glance

  • Also known as 1031471
  • Installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
87167637000
GC number
J09-199
Showing prices

£59.18

£49.32 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 87167637000 is an air/gas mixing chamber assembly (MIDI) for Worcester Bosch Greenstar FSN-GB combi boilers. It combines air and gas in the correct proportions before the mixture reaches the burner. This component is integral to stable combustion and efficient boiler operation.

Signs this part needs replacing

  • Boiler lockout or ignition failure
  • Unstable or noisy flame
  • Whistling or popping sounds from the combustion area
  • Soot deposits or discolouration around the burner
  • Reduced boiler efficiency or erratic performance

Before you order

  • Confirm your boiler model matches the fit list above.
  • Check the existing part number on the component.
  • Installation must be carried out by a Gas Safe registered engineer.
  • Inspect the mixing chamber for cracks, blockages, or debris.

Not sure which part?

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