The Worcester Bosch 87161461600 28i Harness Turbine Flow Switch Assembly is a genuine replacement component engineered to detect water flow within your boiler’s primary heating or hot-water circuit and communicate that flow to the control system. The turbine flow switch uses an internal rotor that spins when water moves past it; as flow increases, the assembly generates a signal that tells the boiler’s control board that demand exists. Accurate flow detection helps ensure the boiler fires only when water is circulating, preventing dry firing, protecting internal components and supporting efficient and safe operation.

This combined harness and flow switch assembly is compatible with Worcester Bosch 28i series boilers that reference part number 87161461600 in their technical documentation. To ensure correct fitment and reliable performance, always verify the part number on your existing assembly or consult your boiler’s service information before installation, as flow sensing components and harness connectors can vary between models and generations.

Supplied ready for direct replacement, the 87161461600 28i Harness Turbine Flow Switch Assembly integrates with the boiler’s existing pipework and electrical harness without modification when installed by a qualified engineer. Choosing this genuine Worcester Bosch component helps restore accurate water flow detection, supports correct system response to heating and hot-water demand and contributes to dependable, trouble-free performance in compatible 28i boilers.