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Honeywell Heating Programmer ST9400S1001

Honeywell

Honeywell Heating Programmer ST9400S1001

Honeywell ST9400S1001 heating programmer for Honeywell residential controls, wired to Earth, Live, Neutral and terminals 3 and 4.

At a glance

  • Part type: Programmers and timers
  • Also known as 4201080
Manufacturer part no.
ST9400S1001
Showing prices

£164.02

£136.68 ex. VAT · VAT at 20%

In stock
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Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Honeywell ST9400S1001 is a heating programmer from Honeywell's residential controls range, catalogued under programmers and timers. It forms part of the control wiring on a domestic heating system, switching the boiler and heating circuits to the set schedule. In the documented installation it was connected at Earth, Live, Neutral and terminals 3 and 4, with terminals 1 and 2 left unwired.

Signs this part needs replacing

No fault symptoms are recorded in the source data for this part.

Before you order

  • Confirm the part number on the existing programmer before ordering.
  • Note the alternative number 4201080, which identifies the same item.
  • Check the wiring at Earth, Live, Neutral and terminals 3 and 4 against the replacement unit before disconnecting anything.
  • Where a replacement control is being fitted in place of this programmer, verify the terminal layout of the new unit matches the existing wiring.

Not sure which part?

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