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Saunier Duval Air Pressure Switch 0020248905

Saunier Duval

Saunier Duval Air Pressure Switch 0020248905

Air pressure switch for Saunier Duval Semia Condens F24E and F30E boilers, part 0020248905.

At a glance

  • Appliance family: Semia Condens
  • Also known as 1417457
Manufacturer part no.
0020248905
Showing prices

£51.16

£42.63 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 air pressure switch is a Saunier Duval component used on Semia Condens appliances. It monitors the pressure produced by the fan and confirms that air is moving through the combustion circuit before the boiler is allowed to fire. If the switch does not prove airflow, the boiler will not run.

Signs this part needs replacing

  • Boiler fails to fire and locks out shortly after the fan starts
  • Fan runs but the boiler will not progress to ignition
  • Intermittent lockouts that clear on reset and return
  • Fault code relating to air pressure or fan proving on the appliance display
  • Visible damage, contamination or blocked sensing ports on the switch

Before you order

  • Confirm the appliance model is a Saunier Duval Semia Condens F24E or F30E
  • Check the part number on the existing switch against 0020248905
  • Inspect the sensing tubes and fan for blockages or leaks before replacing the switch
  • Verify the fault is not caused by a failed fan or blocked flue

Not sure which part?

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