Worcester Bosch
Worcester Bosch Pilot Burner 87161426350
At a glance
- Also known as WB87161426350, 1018377
- Work on gas-carrying components must be carried out by a Gas Safe registered engineer
Showing prices
£144.90
£120.75 ex. VAT · VAT at 20%
In stock
Cut-off passed — dispatches next working day
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 Honeywell Q359A1041 is a pilot burner assembly used in a range of Worcester Bosch gas boilers, including the Highflow, Heatslave and 9.24 Electronic families. It provides the standing pilot flame that ignites the main burner on demand. Worcester Bosch lists this assembly under part number 87161426350.
Signs this part needs replacing
- The pilot flame will not light or will not stay lit once the button or ignition sequence is released
- The pilot flame is weak, yellow or lifting away from the burner instead of forming a steady blue flame
- The boiler repeatedly locks out or fails to reach main burner ignition despite a pilot flame being present
- Soot, discolouration or debris is visible around the pilot burner and its surrounding components
- The pilot assembly is visibly corroded, distorted or damaged
Before you order
- Confirm your appliance model and GC number against the fitment list above
- Check the part number on the existing pilot burner assembly before removal
- Work on gas-carrying components must be carried out by a Gas Safe registered engineer
- Verify the appliance is the correct variant (NG, OF or BF) for the assembly being fitted
Mechanical
| Part type | PILOT BURNERS |
|---|
Compliance
| Manufacturer part number (MPN) | 87161426350 |
|---|---|
| GC number | 391-664 |
| Alternative numbers | WB87161426350, WB87161426350, 1018377 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER 9.24 ELECTRONIC TSW & MK2 BF | 47-311-05 | 47-311-05 | — | — |
| WORCESTER 9.24 ELECTRONIC TSW & MK2 OF | 47-311-04 | 47-311-04 | — | — |
| WORCESTER 9.24 ELECTRONIC TSW & MK2 RSFE | 47-311-07 | 47-311-07 | — | — |
| WORCESTER HEATSLAVE 9.24 MK 1 & MK 1.5 BF | — | — | — | |
| WORCESTER HEATSLAVE 9.24 MK 1 & MK 1.5 OF | — | — | — | |
| WORCESTER HIGHFLOW 3.5 BF COMBI NG | 41-311-39 | 41-311-39 | — | — |
| WORCESTER HIGHFLOW 3.5 OF COMBI NG | 41-311-38 | 41-311-38 | — | — |
| WORCESTER HIGHFLOW 4.5 BF COMBI NG | 41-311-42 | 41-311-42 | — | — |
| WORCESTER HIGHFLOW 4.5 OF COMBI NG | 41-311-41 | 41-311-41 | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
manual
WORCESTER appliance manual — 9.24 ELECTRONIC TSW & MK2 BF (GC 47-311-05), 9.24 ELECTRONIC TSW & MK2 OF (GC 47-311-04), 9.24 ELECTRONIC TSW & MK2 RSFE (GC 47-311-07)
manualmanualWORCESTER appliance manual — HEATSLAVE 9.24 MK 1 & MK 1.5 BF, HEATSLAVE 9.24 MK 1 & MK 1.5 OF
manualmanualWORCESTER appliance manual — HIGHFLOW 3.5 BF COMBI NG (GC 41-311-39), HIGHFLOW 3.5 OF COMBI NG (GC 41-311-38), HIGHFLOW 4.5 BF COMBI NG (GC 41-311-42), HIGHFLOW 4.5 OF COMBI NG (GC 41-311-41)
manualNo technical questions yet for this part.
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