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Potterton Ionisation Electrode 5142400

Potterton

Potterton Ionisation Electrode 5142400

Potterton ionisation electrode 5142400, a flame sensing probe for Potterton Commercial Sirius 2 and Sirius 3 FS boilers.

Manufacturer part no.
5142400
Showing prices

£36.00

£30.00 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 Potterton ionisation electrode, part number 5142400, is a flame sensing probe used in Potterton Commercial gas boilers. It sits in the burner flame path and returns a small ionisation current to the control board, which confirms a flame is present and allows the boiler to continue running. It is listed as a gas boiler spare in the electrodes category.

Signs this part needs replacing

  • Boiler locks out shortly after ignition because no flame is detected
  • Repeated lockouts that clear on reset but return on the next cycle
  • Intermittent or failed ignition sequence despite spark and gas being present
  • Flame signal lost while running, causing the boiler to shut down
  • Visible erosion, cracking or heavy contamination on the probe tip

Before you order

  • Confirm the part number 5142400 against the electrode currently fitted
  • Check the appliance model against the fit list above
  • Compare the probe length, mounting and connector with the part being removed
  • Isolate the electrical supply and gas before starting work

Not sure which part?

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