Refurbished
Worcester Bosch Refurbished PCB 8748300921
Refurbished Worcester Bosch printed circuit board, part number 8748300921, for the Greenstar 12i-30Si and Junior HE range.
At a glance
- Also known as 9500088
- Fitting must be carried out by a Gas Safe registered engineer
£60.48
£50.40 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 8748300921 is the main printed circuit board (PCB) for Worcester Bosch Greenstar boilers. It acts as the control centre of the appliance, monitoring and controlling ignition, the fan, pump and diverter valve via the boiler's switches, thermostats and sensors, and enforcing safety shutdowns if a fault is detected. This is a refurbished, tested unit.
Signs this part needs replacing
- Boiler will not ignite or repeatedly locks out
- Fault codes appear and will not clear
- Display is blank or frozen
- Boiler does not respond to the room thermostat or programmer
- Intermittent shutdowns during heating or hot water demand
Before you order
- Match the part number against the board you are removing
- Isolate the electrical supply before starting work
- Confirm your boiler model is on the fits list above
- Fitting must be carried out by a Gas Safe registered engineer
Compliance
| Alternative numbers | 9500088 |
|---|
No fitment data held for this part.
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.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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