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Ideal Wiring Harness CUI to Primary 176490

Ideal

Ideal Wiring Harness CUI to Primary 176490

Ideal 176490 wiring harness linking the CUI to the primary board, fitted across Classic Combi, Esprit Eco and Exclusive combi models.

At a glance

  • Part type: Wiring harness (CUI to primary)
  • Also known as 1782084
Manufacturer part no.
176490
Showing prices

£25.37

£21.14 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 Ideal 176490 is a wiring harness that runs between the CUI and the primary board on a range of Ideal domestic combi boilers. It carries the control and signal connections between the two points, so the user interface and the main control board can communicate correctly. The harness is supplied as a complete lead with its terminations fitted, ready to plug in during a repair or board replacement.

Signs this part needs replacing

  • The CUI is dead or blank while the boiler still responds at the primary board
  • Intermittent faults that come and go when the harness or its plugs are moved
  • Error codes or lockouts that clear after reseating the connector
  • Visible damage to the lead: chafed insulation, scorching, corrosion or a cracked plug housing
  • A connector that will not latch or has been pulled free from its terminal

Before you order

  • Check the boiler's GC number against the list above, or confirm the model from the data badge, before ordering
  • Confirm the existing harness carries the number 176490 or 1782084
  • Inspect both ends of the original lead so any damaged plug or socket is identified at the same time

Not sure which part?

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