Worcester Bosch
Worcester Bosch Printed Circuit Board 24/28Si II FSN Combi 87483004170
At a glance
- Part type: Printed circuit board
- Appliance family: 24Si II / 28Si II FSN combi
- Also known as WB87483004170, 1020369
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£409.55
£341.29 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Worcester Bosch 87483004170 is the printed circuit board used in the 24Si II and 28Si II FSN combi boiler range. It is the main control board, handling the boiler's operating sequence, from demand recognition through to fan and ignition control, and it manages the safety interlocks that govern burner operation. The board sits inside the appliance casing and connects to the wiring harness, sensors and gas valve assembly.
Signs this part needs replacing
- Boiler fails to respond to a heating or hot water demand, with no pump or fan activity
- Repeated lockouts that clear on reset but return shortly afterwards
- No display, blank display or erratic display behaviour on the boiler fascia
- Fan running continuously or not running at all despite a call for heat
- Visible scorching, discoloured tracks or swollen components on the board itself
Before you order
- Check the GC number on the appliance data badge against the compatibility list to confirm the board matches your model
- Confirm the board currently fitted carries the same part number or one of the alternative references listed below
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Printed circuit board |
|---|---|
| Appliance family | 24Si II / 28Si II FSN Combi |
Compliance
| Manufacturer part number (MPN) | 87483004170 |
|---|---|
| GC number | E88-178 |
| Barcode / EAN | 4010009647690 |
| Commodity code | 8537 10 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | WB87483004170, 1020369 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER 24 SI II RSF NG | 47-311-65 | 47-311-65 | — | — |
| WORCESTER 28 SI II RSF NG | 47-311-67 | 47-311-67 | — | — |
| WORCESTER BRITISH GAS RD628 RSF | 47-108-14 | 47-108-14 | — | — |
| WORCESTER WORCESTER 24SI II RSF NATURAL GAS | — | — | — | |
| WORCESTER WORCESTER 28SI II RSF NATURAL GAS | — | — | — | |
| WORCESTER WORCESTER RD 628 NATURAL GAS | — | — | — |
Documents & drawings
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