Worcester Bosch
Worcester Bosch Control Unit ACU LOP-23 Code Plug 8737604666
Worcester Bosch control unit ACU LOP-23 with code plug, part 8737604666, for Greenstar 2000 Combi GR2301iW 30 C NG appliances.
At a glance
- Part type: control box
- Also known as 25160, 2249514
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£179.39
£149.49 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 ACU LOP-23 is the electronic control unit used on Worcester Bosch Greenstar gas combi appliances, supplied here with a code plug (25160). It manages the boiler's operating sequence, monitoring inputs from sensors and the user controls and switching the fan, gas valve and pump accordingly. The control box is a serviceable assembly, so it can be replaced independently of the rest of the appliance.
Signs this part needs replacing
- The appliance fails to respond to a heating or hot water demand.
- There is no display or no illumination at the control panel.
- The boiler locks out or reports fault codes that clear only briefly, or not at all.
- The fan, pump or gas valve does not operate despite the appliance being powered.
- Intermittent operation that traces back to the control board rather than to a sensor or switch.
Before you order
- Check the appliance GC number and model against the compatibility list to confirm the control unit is the correct one for the boiler.
- Quote part number 8737604666 when ordering, and cross-check any alternative number shown on the original control box.
- Inspect the code plug and its connections before fitting, and confirm any gaskets or seals disturbed during removal are replaced.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Control box |
|---|
Compliance
| Manufacturer part number (MPN) | 8737604666 |
|---|---|
| Alternative numbers | 25160, 2249514 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C NG | 47-800-36 | 47-800-36 | — | — |
| WORCESTER GREENSTAR GR2301iW 30 C NG COMBI | — | — | — |
Documents & drawings
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