Worcester Bosch Heat Exchanger 28kW 87154068140

The Worcester Bosch 87154068140 is a 28kW heat exchanger manufactured for the Greenstar HE and HE Plus Combi appliance families. It is the component that transfers heat from the combustion gases into the domestic hot water and heating circuit, so its condition directly affects how efficiently the boiler runs and how stable the outlet temperature stays. The part is supplied as a direct replacement for the original unit and carries the alternative number 1013075.

• Domestic hot water temperature swings between hot and cold during a draw-off
• Boiler locks out or trips shortly after ignition, with repeated reset attempts needed
• Kettling, banging or rumbling noises from the heat exchanger during heating
• Water weeping from the exchanger body, seals or connection points
• Reduced heating output or a boiler that runs but never reaches the set flow temperature

• Check the GC number and appliance serial plate to confirm the boiler model matches one of the four listed above
• Confirm the existing part number or the alternative number 1013075 before ordering
• Inspect the seals and gaskets on the exchanger connections and replace them if they are compressed or perished
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.