Worcester Bosch
Worcester Bosch Control Unit ACU LOP-23 8737604667
Worcester Bosch control unit ACU LOP-23 with code plug 25161, part 8737604667, for Greenstar 2000 Combi GR2301iW 25 C NG models.
At a glance
- Part type: Control unit, ACU LOP-23
- Appliance family: Greenstar 2000 Combi
- Also known as 25161, 1038559
- 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 control unit ACU LOP-23 is the printed circuit control assembly that governs the operating sequence of the appliance, handling demand, ignition timing and safety interlocks. It is supplied with code plug 25161, which carries the appliance-specific parameter set the board needs to run correctly. The unit is used on Greenstar 2000 Combi GR2301iW 25 C NG appliances.
Signs this part needs replacing
- The boiler fails to fire or repeatedly drops into lockout with no other obvious fault.
- No response from the controls, display or heating and hot water demand.
- Fan or pump runs but the ignition sequence never completes.
- Intermittent operation or repeated resets that clear briefly and return.
- Visible heat damage, corrosion or moisture tracking on the board.
Before you order
- Check the GC number on the appliance data badge against the compatibility list before ordering.
- Confirm the existing control unit is marked ACU LOP-23 and that the code plug reference matches 25161.
- Note any alternative number printed on the board you are replacing.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Miscellaneous Parts |
|---|---|
| Appliance family | Greenstar 2000 Combi |
Compliance
| Manufacturer part number (MPN) | 8737604667 |
|---|---|
| Barcode / EAN | 8737604667 |
| Alternative numbers | 25161, 1038559 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C NG | 47-800-34 | 47-800-34 | — | — |
| WORCESTER GREENSTAR GR2301iW 25 C NG COMBI | — | — | — |
Documents & drawings
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