The Worcester Bosch 87161157540 Flow Sensor Assembly is a genuine Worcester Bosch replacement flow sensor for Greenstar combi boilers. It sits in the boiler’s water pipework and detects when water starts flowing, telling the boiler to switch to hot water mode when a hot tap is opened.
It also works as a safety device, monitoring water flow to protect the boiler. A faulty flow sensor can cause no hot water when a tap is opened, the boiler not firing for hot water, or hot water that cuts in and out.
Key Features
- Genuine Worcester Bosch part – Part No. 87161157540
- Replaces old part number 87161072230
- Detects water flow for hot water demand
- Supplied with fixing clips and O-rings
- Pre-wired with plug-in connector
- 1 year manufacturer guarantee
Compatible Boilers
- Worcester Greenstar 25 CDi, 29 CDi, 30 CDi and 31 CDi
- Worcester Greenstar Junior 24i and 28i (MK5)
- Other Greenstar and Greenstar ErP combi models
Please check your boiler model or match the part number before ordering. If you are unsure, contact us and we will confirm the right part for you.
Specifications
| Brand | Worcester Bosch |
| Part Number | 87161157540 |
| Replaces | 87161072230 |
| EAN | 4047416994567 |
| Type | Flow Sensor Assembly |
| Included | Flow sensor, 3 x clips, 5 x O-rings |
| Condition | New – Genuine Worcester Bosch |
| Guarantee | 1 year manufacturer guarantee |
Installation
This part must be fitted by a Gas Safe registered engineer.





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