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Worcester Bosch Plate Heat Exchanger 22 Plate 8737602364

Worcester Bosch

Worcester Bosch Plate Heat Exchanger 22 Plate 8737602364

Worcester Bosch 22-plate C-PHE heat exchanger, part 8737602364, for Greenstar combi and system boilers; GC number 47-800-39.

At a glance

  • Part type: Plate heat exchanger (C-PHE)
  • Also known as WB8737602364, 1031054, N9363-1
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
8737602364
Showing prices

£55.74

£46.45 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Worcester Bosch 8737602364 is a 22-plate brazed plate heat exchanger, listed by the manufacturer as a C-PHE (combi plate heat exchanger). It sits in the domestic hot water circuit of Worcester Bosch Greenstar appliances, where it transfers heat from the primary heating water into the mains cold water feed to deliver hot water on demand. The plate stack gives a large surface area in a compact body, so it is a serviceable item that can scale up or block over time.

Signs this part needs replacing

  • Hot water runs lukewarm or loses temperature as the tap is held open
  • Reduced hot water flow rate compared with the cold supply
  • Fluctuating outlet temperature at hot taps and showers
  • Visible weeping or staining between the plates or at the connections
  • Scale or debris restricting the secondary side, often after work on the mains supply

Before you order

  • Check the GC number and appliance serial plate against the compatibility list to confirm the correct variant
  • Compare the existing plate count and part number on the removed component before ordering
  • Have a replacement gasket or seal kit to hand if the connections are disturbed during the swap
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.