Worcester Bosch
Worcester Bosch Ignition Lead 87186812840
At a glance
- Part type: HT lead (ignition lead)
- Also known as WB87186812840, 1022637
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Showing prices
£15.72
£13.10 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 87186812840 is an ignition lead, also listed as an HT lead, used on Worcester Bosch gas appliances. It carries the high-tension voltage from the ignition source to the spark electrode so the burner can be lit reliably at every demand for heat or hot water. It belongs to the cables, leads and wiring harnesses group of Worcester spare parts and is used across the Greenstar FS and Highflow ranges.
Signs this part needs replacing
- The appliance fails to ignite, with no spark at the electrode despite a call for heat or hot water.
- Repeated lockouts or ignition faults that clear intermittently and then return.
- Visible cracking, brittleness or scorching on the lead insulation.
- Tracking marks or arcing where the lead runs close to earthed metalwork.
- A loose, corroded or heat-damaged connector at either end of the lead.
Before you order
- Check the GC number and appliance serial plate against the compatibility list to confirm the lead suits your model.
- Confirm the part number on the existing lead matches 87186812840, or one of the alternative numbers listed below.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Cables, Leads & Wiring Harnesses |
|---|---|
| Length | 0.1mm |
| Width | 0.1mm |
| Depth | 0.1mm |
Compliance
| Manufacturer part number (MPN) | 87186812840 |
|---|---|
| GC number | H71-346 |
| Barcode / EAN | 4047416795836 |
| Commodity code | 8544 42 90 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | WB87186812840, 1022637 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR FS30 CDI REGULAR | 41-406-62 | 41-406-62 | — | — |
| WORCESTER GREENSTAR FS30 CDI REGULAR LPG | 41-406-63 | 41-406-63 | — | — |
| WORCESTER GREENSTAR FS42 CDI REGULAR | 41-406-64 | 41-406-64 | — | — |
| WORCESTER GREENSTAR FS42 CDI REGULAR LPG | 41-406-65 | 41-406-65 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDI LPG | 47-406-26 | 47-406-26 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDI NG | 47-406-24 | 47-406-24 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP LPG (7731600099) | 47-406-90 | 47-406-90 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP LPG (7738100590) | 47-406-86 | 47-406-86 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP NG (7731600098) | 47-406-89 | 47-406-89 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP NG (7738100589) | 47-406-85 | 47-406-85 | — | — |
Showing 10 of 20 compatible appliances.
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 — GREENSTAR FS30 CDI REGULAR (GC 41-406-62), GREENSTAR FS30 CDI REGULAR LPG (GC 41-406-63), GREENSTAR FS42 CDI REGULAR (GC 41-406-64), GREENSTAR FS42 CDI REGULAR LPG (GC 41-406-65)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDI LPG (GC 47-406-26), GREENSTAR HIGHFLOW 440CDI NG (GC 47-406-24), GREENSTAR HIGHFLOW 550CDI LPG (GC 47-406-25), GREENSTAR HIGHFLOW 550CDI NG (GC 47-406-27)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDi ErP LPG (7731600099) (GC 47-406-90), GREENSTAR HIGHFLOW 440CDi ErP NG (7731600098) (GC 47-406-89), GREENSTAR HIGHFLOW 550CDi ErP LPG (7731600101) (GC 47-406-92), GREENSTAR HIGHFLOW 550CDi ErP NG (7731600100) (GC 47-406-91)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDi ErP LPG (7738100590) (GC 47-406-86), GREENSTAR HIGHFLOW 440CDi ErP NG (7738100589) (GC 47-406-85), GREENSTAR HIGHFLOW 550CDi ErP LPG (7738100592) (GC 47-406-88), GREENSTAR HIGHFLOW 550CDi ErP NG (7738100591) (GC 47-406-87)
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