Worcester Bosch DHW Plate Heat Exchanger 87161066850 (14-Plate)

Worcester Bosch OEM secondary (DHW) plate heat exchanger for Greenstar/CDi combi boilers. This 14-plate unit transfers heat from the boilers primary circuit to your tap water for fast, stable hot water performance.

• Manufacturer: Worcester Bosch
• Part type: Plate heat exchanger DHW/secondary
• MPN: 87161066850
• GTIN / EAN: 4010009876137
• Plate count: 14
• GC number: H02-531

Compatible boilers (examples)

Used across multiple Greenstar and CDi families (variant/year dependent). Common fits include:

• Greenstar i Junior 24i, 28i
• Greenstar Si 30Si (NG/LPG)
• Greenstar i (ErP) 30i
• Greenstar CDi 25CDi, 29CDi Classic, 30CDi

Always confirm against your boilers data plate/parts manual using MPN 87161066850 before ordering.

What this part does

The DHW plate heat exchanger keeps boiler water and tap water separate while efficiently transferring heat, ensuring reliable hot water delivery.

When to replace

• Fluctuating or lukewarm hot water
• Poor flow due to internal blockage/scaling
• Confirmed internal leak or cross-contamination

What’s in the box

• 1 Worcester Bosch DHW plate heat exchanger 87161066850