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Ferroli Flue Gas Temperature Probe Kit 39845890

Ferroli

Ferroli Flue Gas Temperature Probe Kit 39845890

Ferroli flue gas temperature probe kit, part 39845890, for Modena, T-ONE, Bluehelix Hitech and Twist PRO boilers.

At a glance

  • Part type: flue gas temperature probe kit / heat exchanger sensor
  • Also known as 3510245
Manufacturer part no.
39845890
Showing prices

£29.34

£24.45 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 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 Ferroli 39845890 is a flue gas temperature probe kit for the heat exchanger circuit on Ferroli gas boilers. It monitors flue gas temperature at the heat exchanger so the boiler control can regulate combustion and shut down safely if temperatures rise beyond range. It is listed by Ferroli as a sensor for the heat exchanger.

Signs this part needs replacing

  • Boiler locks out or shuts down during or shortly after firing
  • Flue gas temperature fault code or sensor error displayed on the control
  • Erratic or implausible temperature readings from the flue circuit
  • Intermittent operation that clears on reset and returns
  • Overheat-related lockouts not explained by circulation or water pressure faults

Before you order

  • Confirm your boiler model against the fitment list above
  • Check the part number on the existing sensor matches 39845890
  • Identify whether your appliance is the NG or LPG variant where the model listing distinguishes between them
  • Confirm the boiler serial or product code where the fitment list gives one

Not sure which part?

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