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Alpha Modulating Coil 6.8440130

Alpha

Alpha Modulating Coil 6.8440130

Modulating coil and spring for the VR4605A gas valve, suitable for Alpha 240 and 280 series boilers.

At a glance

  • Also known as MODULATING-COILSPRING, 1251387
Manufacturer part no.
6.8440130
GC number
343-585
Showing prices

£49.12

£40.93 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 modulating coil and spring is a component for the VR4605A gas valve. It controls the gas valve's modulation, allowing the boiler to adjust burner output to match demand. This part is used in Alpha 240, 280 and 500 series boilers.

Signs this part needs replacing

  • Boiler fails to modulate burner output, causing temperature fluctuations.
  • Flame remains at a fixed rate regardless of demand.
  • Intermittent lockout or ignition faults linked to gas valve operation.
  • Unstable hot water temperature.
  • Poor central heating response.

Before you order

  • Check your boiler model and GC number against the Fits list.
  • Confirm the gas valve is a VR4605A type.
  • Inspect the existing coil and spring for damage or wear.
  • Ensure the part number 6.8440130 matches your requirement.

Not sure which part?

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