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Ideal 3 Pin Connector Aux Pump 174740

Ideal

Ideal 3 Pin Connector Aux Pump 174740

Ideal 174740 three-pin connector for the auxiliary pump circuit on Ideal Commercial boilers, supplied as a spare plug-in electrical link.

At a glance

  • Part type: 3 pin connector, auxiliary pump
  • Appliance family: Ideal Commercial
  • Also known as 1780124
Manufacturer part no.
174740
Showing prices

£14.54

£12.12 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 174740 is a three-pin electrical connector used on the auxiliary pump circuit of Ideal Commercial boilers. It forms the plug-in link between the pump and the boiler wiring harness, carrying the supply and control signals the pump needs to circulate water around the system. It is supplied as a spare part by Ideal and is fitted where the original connector has been damaged or has lost reliable contact.

Signs this part needs replacing

  • The auxiliary pump does not run, or runs intermittently, with the boiler otherwise calling for heat
  • Pump operation changes when the connector or its cable is moved
  • The connector housing shows heat damage, discolouration or a burnt smell
  • Pins are loose, corroded or pushed back in the housing, giving poor contact
  • Pump-related fault codes or lockouts appear on the boiler controls

Before you order

  • Confirm the boiler model and serial number against the compatibility list before ordering
  • Check the existing connector has three pins and matches the terminal layout on the pump
  • Note the alternative part number 1780124 when searching for this item

Not sure which part?

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