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Ariston Air Pressure Switch 573579

Ariston

Ariston Air Pressure Switch 573579

Air pressure switch for the Ariston STYX SX 20 MFF boiler, part number 573579.

At a glance

  • Appliance family: Ariston STYX SX 20 MFF
  • Also known as 1571022
Manufacturer part no.
573579
Showing prices

£86.10

£71.75 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 Ariston 573579 is an air pressure switch used in the Ariston STYX SX 20 MFF gas boiler. It monitors the pressure difference created by the fan and provides a signal to the boiler's control circuit to prove that air flow is established before ignition. Part number 573579 is the reference for this switch.

Signs this part needs replacing

  • Boiler fails to fire, with the fan running but no ignition sequence starting
  • Repeated lockouts or fault codes relating to air flow or pressure proving
  • Intermittent operation where the boiler runs and then cuts out shortly after start-up
  • No switching action at the switch when the fan is running, confirmed by meter testing

Before you order

  • Confirm the boiler model is Ariston STYX SX 20 MFF and that the serial number is 92010000 or later
  • Check the part number on the existing switch matches 573579
  • Inspect the sensing tubes and connections for blockages or splits before assuming the switch is at fault
  • Isolate the electrical supply and gas supply before carrying out any work

Not sure which part?

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