Worcester Bosch
Worcester Bosch Control Unit Acu LOP-22 8737604247
Worcester Bosch control unit 8737604247 (Acu LOP-22) with code plug, for Greenstar 1000 Series GR1000W 30 C NG boilers. Cross-references 1038507.
At a glance
- Part type: Control unit / printed circuit board
- Appliance family: Greenstar 1000 Series
- Also known as 25157, 1038507
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£180.38
£150.32 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 8737604247 is a control unit for the Greenstar 1000 Series of gas boilers, supplied with a code plug. It is the printed circuit board assembly that manages the appliance's operating sequence and its communication with the boiler controls and sensors. The unit is listed under the Acu LOP-22 designation and carries the Worcester Bosch alternative reference 1038507.
Signs this part needs replacing
- The boiler does not respond when there is a call for heat or hot water
- A blank, dark or unlit display where the control unit normally shows status
- Repeated lockouts or fault codes traced back to the control board
- Intermittent running, or the appliance ignoring commands from the room thermostat and programmer
- Visible heat damage, discolouration or corrosion on the board or its connectors
Before you order
- Confirm your appliance model and GC number, particularly 47-800-39 for the Greenstar 1000 Series GR1000W 30 C NG.
- Check the part number on the existing board against 8737604247, or cross-reference the alternative number 1038507.
- The replacement control unit is supplied with its code plug, so both can be fitted together as one assembly.
- 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 |
|---|---|
| Appliance family | Greenstar 1000 Series |
Compliance
| Manufacturer part number (MPN) | 8737604247 |
|---|---|
| Barcode / EAN | 8737604247 |
| Alternative numbers | 25157, 1038507 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 1000 SERIES GR1000W 30 C NG | 47-800-39 | 47-800-39 | — | — |
| WORCESTER GREENSTAR GR1000W 30 C NG | — | — | — |
Documents & drawings
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