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Riello Photocell Mectron R40

Popular OIL

Riello Photocell Mectron R40

Riello Mectron R40 photocell flame sensor for oil-fired boiler burner assemblies, listed under Popular OIL Spares oil spare parts.

At a glance

  • Part type: photocell (flame detection sensor)
Manufacturer part no.
HRP9025
Showing prices

£42.54

£35.45 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 Riello Mectron R40 is a photocell used as a flame detection sensor on oil-fired boiler burner assemblies. It monitors the flame while the burner is running and provides the flame signal the burner control box needs to keep the burner firing. It is listed within the Popular OIL Spares oil spare parts range.

Signs this part needs replacing

  • Burner locks out shortly after ignition even though a flame is present
  • Repeated lockouts on start-up with no other fault identified
  • Burner fires and then shuts down part-way through its running cycle
  • Flame failure indicated by the control box when the burner appears to be running normally
  • Photocell face contaminated with soot or carbon that cannot be cleaned off

Before you order

  • Confirm the burner model and control box fitted to the appliance
  • Check the part number marked on the existing photocell against the Mectron R40
  • Check the mounting arrangement on the burner matches the photocell body

Not sure which part?

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