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Vaillant Cable Tree (Harness) 0020035224

Vaillant

Vaillant Cable Tree (Harness) 0020035224

Vaillant cable tree wiring harness, part 0020035224, for EcoTEC PLUS 400 series and VU boilers.

At a glance

  • Also known as 1380004
Manufacturer part no.
0020035224
Showing prices

£9.60

£8.00 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 Vaillant cable tree (harness) is a wiring loom for EcoTEC PLUS 400 series and VU boilers, supplied under part number 0020035224. It carries the electrical connections between the boiler's control board and the components it operates. A damaged or failed harness can interrupt those connections and stop the boiler working correctly.

Signs this part needs replacing

  • Boiler fails to fire or cuts out intermittently with no obvious fault elsewhere
  • Fault codes relating to the PCB, fan, pump or sensors appear and clear at random
  • Visible damage to the loom, such as frayed wires, cracked insulation, scorch marks or heat damage
  • Loose, corroded or discoloured connectors that will not seat properly
  • Wiring disturbed or broken during previous repairs

Before you order

  • Confirm your boiler model and GC number against the fit list above
  • Check the connector count and plug layout on the existing harness match the new part
  • Inspect the old harness for the actual fault before ordering, as similar symptoms can come from the PCB or sensors
  • Have the boiler's part number to hand when checking against the manufacturer's parts list

Not sure which part?

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