Worcester Bosch
Worcester Bosch Valve (CH) 8737604742
Worcester Bosch central heating valve, part number 8737604742, for Greenstar 1000 Series Gr1000W combi boilers.
At a glance
- Part type: central heating (CH) valve
- Appliance family: Worcester Greenstar 1000 Series Gr1000W
- Also known as 1038489
£37.51
£31.26 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
This is a central heating (CH) valve, supplied under part number 8737604742 by Worcester Bosch. It is a boiler component intended for use within the Worcester Greenstar 1000 Series Gr1000W combi range, where it forms part of the appliance's heating circuit. The valve controls the flow of heating water within the boiler's hydraulic arrangement.
Signs this part needs replacing
- Loss of heating output or no heat to the radiators despite the boiler running
- Water weeping or visible traces of leakage around the valve body or its connections
- The valve failing to open or close correctly, leaving the heating circuit stuck on or off
- Fault codes or lockout conditions on the boiler linked to the heating circuit
- Unusual noise from the valve area during a heating demand
Before you order
- Confirm the boiler model and GC number against the fitment list above
- Check the existing valve part number matches 8737604742 before ordering
- Verify the appliance is a Greenstar 1000 Series Gr1000W 24 C or 30 C NG unit
- Isolate the boiler and its water supply before any work on the valve
Compliance
| Alternative numbers | 1038489 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 1000 SERIES GR1000W 24 C NG | 47-800-38 | 47-800-38 | — | — |
| WORCESTER GREENSTAR 1000 SERIES GR1000W 30 C NG | 47-800-39 | 47-800-39 | — | — |
| WORCESTER GREENSTAR GR1000W 24 C NG | — | — | — | |
| WORCESTER GREENSTAR GR1000W 30 C NG | — | — | — |
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.
No technical questions yet for this part.
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