Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Glow-worm Swiftflow electro-mechanical timer kit with override 452390

Glow-worm

Glow-worm Swiftflow electro-mechanical timer kit with override 452390

Genuine electro-mechanical clock timer kit with manual override for the Glow-worm Swiftflow boiler range.

At a glance

  • Also known as GLOWWORM452390
Manufacturer part no.
452390
Showing prices

£180.00

£150.00 ex. VAT · VAT at 20%

In stock
Cut-off passed — dispatches next working day
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 452390 is an electro-mechanical timer kit for the Glow-worm Swiftflow boiler range, also listed against Saunier Duval. It provides the boiler's on/off time control, with a manual override switch for heating on demand outside the programmed schedule.

Signs this part needs replacing

  • Boiler will not switch on or off at the programmed times
  • Timer clock resets or loses time after a power cut
  • Override switch fails to bring the heating on
  • Timer dial or switch mechanism is stiff, cracked or unresponsive

Before you order

  • Match the part number printed on your existing timer unit before ordering
  • Isolate electrical power before removing or fitting the timer

Not sure which part?

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