Worcester Bosch
Worcester Bosch Valve (CH Flow) 8737604673
Worcester Bosch central heating flow valve, part number 8737604673, for Greenstar 2000 Combi and Gr2301IW appliances.
At a glance
- Also known as 1038573
£53.41
£44.51 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 VALVE (CH FLOW) is a Worcester Bosch central heating flow valve, supplied under part number 8737604673. It forms part of the central heating circuit on Greenstar 2000 Combi and Gr2301IW appliances, where it controls the flow of heated water through the heating side of the boiler. The valve is a serviceable component used when the original has failed or is no longer sealing or operating correctly.
Signs this part needs replacing
- Heating circuit fails to reach temperature or radiators stay cold while hot water runs normally
- Visible water or weepage around the valve body or its connections
- Valve no longer operates or feels seized when moved
- Boiler reports a flow-related fault or locks out on the heating side
- Persistent air or circulation noise from the heating circuit with no other cause found
Before you order
- Confirm the appliance model and variant, including output rating and gas type, against the fits list
- Check the existing part number 8737604673 on the component or in the appliance documentation
- Verify whether any other heating circuit components show signs of wear before ordering
- Confirm the appliance is isolated and depressurised before any work begins
Compliance
| Alternative numbers | 1038573 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C LPG | 47-800-35 | 47-800-35 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C NG | 47-800-34 | 47-800-34 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C LPG | 47-800-37 | 47-800-37 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C NG | 47-800-36 | 47-800-36 | — | — |
| WORCESTER GREENSTAR GR2301iW 25 C LPG COMBI | — | — | — | |
| WORCESTER GREENSTAR GR2301iW 25 C NG COMBI | — | — | — | |
| WORCESTER GREENSTAR GR2301iW 30 C LPG COMBI | — | — | — | |
| WORCESTER GREENSTAR GR2301iW 30 C NG COMBI | — | — | — |
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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