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Main Heat Exchanger Primary 5113284

Main

Main Heat Exchanger Primary 5113284

Primary heat exchanger, part 5113284, for Main System and Potterton Performa System HE boilers.

At a glance

  • Also known as 1123786
Manufacturer part no.
5113284
Showing prices

£276.22

£230.18 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 primary heat exchanger (part 5113284) is a Main component that transfers heat from the burner into the boiler's primary water circuit. It is fitted to Main System HE and Potterton Performa System HE appliances. The part number is stamped or labelled on the unit for identification.

Signs this part needs replacing

  • Water weeping or visible leaks from the heat exchanger body or its connections
  • Kettling, banging or rumbling noises from the boiler during heating
  • Black or discoloured water and sludge build-up in the primary circuit
  • Reduced heating or hot water output despite the burner firing correctly
  • Repeated overheat lockouts or high-limit trips

Before you order

  • Confirm your boiler model against the fit list above before ordering
  • Check the part number on the existing heat exchanger matches 5113284
  • Check whether gaskets, seals or washers are required separately, as they are not confirmed as included
  • Fitting should be carried out by a competent heating engineer, with the system drained and refilled as required

Not sure which part?

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