Worcester Bosch Heat Exchanger 87161064360

The Worcester Bosch 87161064360 is a heat exchanger used in Worcester Bosch Greenstar 8000 and 8000+ Style combi boilers. It transfers heat from the combustion circuit into the domestic hot water and heating water, so it sits at the centre of the appliance's day-to-day performance. The part is supplied as a single unit and carries a 1 year manufacturer guarantee.

• Domestic hot water runs lukewarm or fluctuates while the boiler is otherwise firing normally
• Radiators heat unevenly or the heating circuit takes noticeably longer to reach temperature
• 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 scale-related fault codes traced to the heat exchanger

• Check the GC number on the appliance data badge against the list above, as the same boiler range can use different heat exchangers across variants.
• Confirm the model and, where relevant, the serial number before ordering, and cross-check the alternative part number 2249204 against the part being removed.
• Inspect the seals and gaskets on the existing assembly before refitting, as these are disturbed during removal.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.