Worcester Bosch
Worcester Bosch Pump Head Para 7M 8737603366
Worcester Bosch pump head rated at 7 m for Greenstar 2000 Combi Gr2300IW appliances.
At a glance
- Also known as 8905835
£266.90
£222.42 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 PUMP HEAD PARA 7M is a Worcester Bosch circulating pump head, rated at 7 m, used in Greenstar 2000 Combi Gr2300IW appliances. It moves primary water around the heating circuit and through the domestic hot water plate heat exchanger, so the boiler can deliver heat to the radiators and hot water draw-off. It is supplied as the pump head assembly, identified by part number 8737603366.
Signs this part needs replacing
- The boiler runs but radiators stay cold or heat unevenly, indicating poor circulation
- Kettling, whining or grinding noise from the pump area during operation
- Boiler overheating and locking out repeatedly on a circulation-related fault
- Domestic hot water temperature fluctuating or running cool despite the burner firing
- Visible leakage, corrosion or a seized impeller at the pump head
Before you order
- Confirm the boiler model and GC number against the fit list above, as the same appliance family is built in several variants
- Check the fault symptoms point to the pump rather than a blocked system, airlock or faulty diverter
- Verify the existing pump head is a 7 m unit before ordering
- Isolate the electrical supply and shut the relevant isolation valves before removing the pump head
Compliance
| Alternative numbers | 8905835 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 25 C LPG | 47-800-27 | 47-800-27 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 25 C NG | 47-800-26 | 47-800-26 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 30 C LPG | 47-800-29 | 47-800-29 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 30 C NG | 47-800-28 | 47-800-28 | — | — |
| WORCESTER GREENSTAR GR2300iW 25 C LPG COMBI | 47-800-27 | 47-800-27 | — | — |
| WORCESTER GREENSTAR GR2300iW 25 C NG COMBI | 47-800-26 | 47-800-26 | — | — |
| WORCESTER GREENSTAR GR2300iW 30 C LPG COMBI | 47-800-29 | 47-800-29 | — | — |
| WORCESTER GREENSTAR GR2300iW 30 C NG COMBI | 47-800-28 | 47-800-28 | — | — |
Documents & drawings
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