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Sime Ionisation Electrode 6221617

Sime

Sime Ionisation Electrode 6221617

Ionisation electrode for Sime Dewy and Planet Dewy gas boilers, part number 6221617.

At a glance

  • Also known as 2040838
Manufacturer part no.
6221617
Showing prices

£58.37

£48.64 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 Sime 6221617 is an ionisation electrode for Sime gas boilers. It is fitted in the combustion circuit to detect the presence of a flame and signal the boiler's control board. This electrode is used across the Sime Dewy and Planet Dewy appliance families.

Signs this part needs replacing

  • Boiler locks out or fails to ignite despite spark being present
  • Flame is established but the boiler shuts down shortly after
  • Intermittent flame failure errors or lockouts
  • No flame detection signal at the control board
  • Visible damage, corrosion or contamination on the electrode tip

Before you order

  • Confirm your boiler model and GC number against the Fits list above
  • Check the part number on the existing electrode matches 6221617
  • Ensure the boiler is isolated from the gas and electrical supply before fitting
  • Refer to the manufacturer's service instructions for correct fitting and gap setting

Not sure which part?

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