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Alpha Wiring Harness 3.018589

Alpha

Alpha Wiring Harness 3.018589

Main supply wiring harness for Alpha CD and Intec boilers, part number 3.018589.

At a glance

  • Also known as WIRING-ASSY-MAIN-SUPPLY-CD252835C, 1258643
Manufacturer part no.
3.018589
Showing prices

£81.01

£67.51 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 Alpha 3.018589 is a main supply wiring harness for Alpha CD and Intec boilers. It provides the electrical connections for the terminal block, fuse holder and clock within the appliance. It is fitted as part of the boiler's main power supply wiring assembly.

Signs this part needs replacing

  • Boiler fails to power up, or power cuts in and out
  • Burnt, discoloured or brittle wiring or connector housings
  • Loose or corroded terminals at the terminal block or fuse holder
  • Clock or control panel losing power or behaving erratically
  • Visible damage to the harness insulation or conductors

Before you order

  • Confirm your boiler model and GC number against the fitment list
  • Check the part number on the existing harness where it is visible
  • Verify the connector layout and number of ways match the existing harness
  • Isolate the electrical supply before removing or fitting the harness

Not sure which part?

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