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Vaillant Heat Exchanger 0020238986

Vaillant

Vaillant Heat Exchanger 0020238986

Vaillant heat exchanger, part number 0020238986, for VUW 246/7-2 and VUW 286/7-2 boiler variants.

At a glance

  • Part type: heat exchanger
  • Also known as 1388412
Manufacturer part no.
0020238986
Showing prices

£69.85

£58.21 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
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 Vaillant 0020238986 is a heat exchanger used in Vaillant gas boilers. It transfers heat from the combustion circuit into the domestic hot water and heating water circuits. It is listed for the VUW 246/7-2 and VUW 286/7-2 appliance families, including the Ecotec Sustain variants.

Signs this part needs replacing

  • Domestic hot water temperature fluctuating or running hot and cold during draw-off
  • Kettling, banging or rumbling noises from the heat exchanger during operation
  • Water weeping or staining around the heat exchanger body or its connections
  • Reduced heating output or poor heat transfer across the circuit
  • Repeated boiler lockouts or overheat faults linked to restricted flow through the exchanger

Before you order

  • Confirm your boiler model against the fit list above before ordering
  • Check the part number on the existing component matches 0020238986
  • Verify the appliance variant, as VUW 246/7-2 and VUW 286/7-2 use different ratings
  • Check for any visible scale or debris in the system that may have caused the failure

Not sure which part?

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