Worcester Bosch
Worcester Bosch Printed Circuit Board i Junior Series 87483004840
At a glance
- Part type: Printed circuit board (PCB)
- Also known as WB87483004840, 1020379, N5440
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£256.73
£213.94 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 printed circuit board is the control centre of an i Junior series boiler. It monitors and regulates every process in the system through switches, thermostats and sensors, managing ignition sequencing, temperature control and pump operation. It also enforces the boiler's safety logic, shutting down functions when internal readings indicate a fault such as high pressure or a low water level.
Signs this part needs replacing
- The boiler has no display, no power to the controls or fails to respond when a demand is called.
- Repeated lockouts or fault codes that clear only temporarily after a reset.
- Erratic behaviour such as the fan, pump or ignition running out of sequence.
- The boiler fires briefly and then shuts down, or fails to fire at all despite a call for heat.
- Visible damage to the board, including scorching, burnt tracks or swollen components.
Before you order
- Check the boiler's GC number and model plate against the compatibility list, as several i Junior variants use different boards.
- Confirm the numbers on the existing board match this part number 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 | Printed Circuit Boards (PCB) |
|---|---|
| Length | 0.1mm |
| Width | 0.1mm |
| Depth | 0.1mm |
Compliance
| Manufacturer part number (MPN) | 87483004840 |
|---|---|
| GC number | H05-452 |
| Barcode / EAN | 4010009680925 |
| Commodity code | 8537 10 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | WB87483004840, 1020379, N5440 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER 24i JUNIOR RSF LPG | 47-311-71 | 47-311-71 | — | — |
| WORCESTER 24i JUNIOR RSF NG | 47-311-69 | 47-311-69 | — | — |
| WORCESTER 28i JUNIOR RSF NG (FEB 2003) | 47-311-72 | 47-311-72 | — | — |
| WORCESTER 28i JUNIOR RSF NG (MAY 2003) | 47-311-70 | 47-311-70 | — | — |
| WORCESTER WORCESTER 24i JUNIOR RSF LPG | — | — | — | |
| WORCESTER WORCESTER 24i JUNIOR RSF NATURAL GAS | — | — | — | |
| WORCESTER WORCESTER 28i JUNIOR RSF LPG | — | — | — | |
| WORCESTER WORCESTER 28i JUNIOR RSF NATURAL GAS | — | — | — |
Documents & drawings
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