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Sime Heat Exchanger 5188393

Sime

Sime Heat Exchanger 5188393

Sime heat exchanger, part 5188393, for use in listed DEWY and Planet DEWY gas boiler models.

At a glance

  • Also known as 2043120
Manufacturer part no.
5188393
Showing prices

£1,402.68

£1,168.90 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 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 Sime 5188393 is a heat exchanger used in Sime gas boilers, transferring heat from the combustion circuit into the appliance water circuit. It is listed by Sime under the supplied product name HEAT EXCHANGER and is supplied for the DEWY and Planet DEWY appliance families.

Signs this part needs replacing

  • Reduced or fluctuating domestic hot water temperature at the taps
  • Water weeping or staining around the heat exchanger body or its connections
  • Kettling, banging or rumbling noises from the appliance during heating
  • Repeated overheating or overheat lockout despite correct system pressure
  • Poor heat transfer consistent with internal scaling or blockage

Before you order

  • Confirm the appliance model matches one of the models listed under Fits
  • Check the existing heat exchanger part number against 5188393 before removal
  • Verify the appliance GC number against the data badge where fitted
  • Inspect associated seals, gaskets and connections for condition before fitting

Not sure which part?

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