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Main Sensing Electrode 5111403

Main

Main Sensing Electrode 5111403

Sensing electrode, part 5111403, for Main Multipoint FF and Multipoint FF ErP multipoint water heaters.

At a glance

  • Part type: sensing electrode
  • Also known as 1160783
Manufacturer part no.
5111403
GC number
H18-927
Showing prices

£87.61

£73.01 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 Main 5111403 is a sensing electrode used in Main Multipoint FF water heaters. It sits in the combustion path and provides the flame signal back to the control board, allowing the appliance to confirm that ignition has taken place and to shut the gas supply safely if the flame is lost.

Signs this part needs replacing

  • The water heater fails to ignite or locks out shortly after the burner lights
  • Flame is established but the appliance shuts down as though no flame were present
  • Repeated lockouts that clear on reset and then return
  • Intermittent hot water as the burner drops out during a draw-off
  • Visible damage, heavy contamination or a degraded electrode probe or lead

Before you order

  • Confirm your appliance is a Main Multipoint FF or Multipoint FF ErP
  • Check the model and GC number on the appliance data badge against the fit list above
  • Inspect the existing electrode and its lead for contamination or damage before ordering
  • Confirm the electrode type and connection on your appliance match the part number 5111403

Not sure which part?

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