Worcester Bosch
Worcester Bosch Heat Exchanger WB5-II+ 8737711083
Worcester Bosch heat exchanger WB5-II+ for Greenstar and Greenstar 8000+ Style gas appliances.
At a glance
- Also known as 2249208
£750.68
£625.57 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 HEAT EXCHANGER WB5-II+ is a Worcester Bosch heat exchanger, supplied under part number 8737711083. It transfers heat from the combustion process into the heating and domestic hot water circuits on Worcester Greenstar and Greenstar 8000+ Style appliances. It is a core component of the appliance's water circuit and is fitted where the listed models require this assembly.
Signs this part needs replacing
- Reduced heating or hot water output that cannot be traced to other components
- Kettling, banging or gurgling noises from the appliance during operation
- Water weeping or staining around the heat exchanger body or its connections
- Repeated overheat lockouts or temperature-related fault codes
- Discoloured or dirty system water with debris collecting in the heat exchanger
Before you order
- Confirm the appliance model and GC number against the fit list above
- Check that the appliance is a natural gas (NG) unit
- Verify the existing part number 8737711083 or WB5-II+ marking on the component being replaced
- Confirm access and isolation arrangements before draining the appliance
Compliance
| Alternative numbers | 2249208 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 8000+ STYLE COMBI GR8701iW 32 C NG | 47-800-44 | 47-800-44 | — | — |
| WORCESTER GREENSTAR 8000+ STYLE COMBI GR8701iW 32 CB NG | 47-800-49 | 47-800-49 | — | — |
| WORCESTER GREENSTAR 8000+ STYLE COMBI GR8701iW 36 C NG | 47-800-45 | 47-800-45 | — | — |
| WORCESTER GREENSTAR 8000+ STYLE COMBI GR8701iW 36 CB NG | 47-800-50 | 47-800-50 | — | — |
| WORCESTER GREENSTAR 8000+ STYLE COMBI GR8701iW 40 C NG | 47-800-46 | 47-800-46 | — | — |
| WORCESTER GREENSTAR 8000+ STYLE REGULAR GR8701iW 30 R NG | 41-800-29 | 41-800-29 | — | — |
| WORCESTER GREENSTAR 8000+ STYLE REGULAR GR8701iW 35 R NG | 41-800-30 | 41-800-30 | — | — |
| WORCESTER GREENSTAR 8000+ STYLE REGULAR GR8701iW 40 R NG | 41-800-31 | 41-800-31 | — | — |
| WORCESTER GREENSTAR 8000+ STYLE SYSTEM GR8701iW 30 S NG | 41-800-27 | 41-800-27 | — | — |
| WORCESTER GREENSTAR 8000+ STYLE SYSTEM GR8701iW 35 S NG | 41-800-28 | 41-800-28 | — | — |
Showing 10 of 20 compatible appliances.
Documents & drawings
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