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Sime Heat Exchanger 6174221

Sime

Sime Heat Exchanger 6174221

Sime 6174221 heat exchanger for Format, Friendly Format, Planet and Super 90 MKII gas boilers.

At a glance

  • Also known as HEAT-EXCHANGER-PR20326001, 2040652
Manufacturer part no.
6174221
Showing prices

£341.27

£284.39 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 6174221 is a heat exchanger used in a range of Sime gas boilers, including the Format, Friendly Format, Planet and Super 90 MKII families. It transfers heat from the combustion gases to the domestic heating and hot water circuit. The part is listed under Sime reference PR20326001.

Signs this part needs replacing

  • Visible leaks or weeping from the heat exchanger body or its connections
  • Overheating or repeated high-limit trips during normal operation
  • Reduced heating or hot water output with no other obvious cause
  • Scale or corrosion build-up restricting flow through the exchanger
  • Kettling, banging or gurgling noises from the appliance during firing

Before you order

  • Confirm your boiler model and serial number against the fitment list above
  • Check the existing heat exchanger for the Sime part number or PR20326001 reference
  • Inspect associated seals, gaskets and connections for condition before fitting
  • Verify the appliance is isolated from gas, water and power before any work begins

Not sure which part?

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