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Ariston Service Kit - Main Flowswitch 570720

Ariston

Ariston Service Kit - Main Flowswitch 570720

Service kit for the main circuit flowswitch on Ariston Challenger and Eurocombi SX 20 MFFI boilers.

At a glance

  • Also known as 1571144
Manufacturer part no.
570720
Showing prices

£42.00

£35.00 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

A service kit for the main circuit flowswitch, manufactured by Ariston and supplied under part number 570720. It is used on Ariston Challenger and Eurocombi SX 20 MFFI boiler appliances. The kit provides the components required to service or restore the main circuit flowswitch so the boiler can sense water flow and operate correctly.

Signs this part needs replacing

  • The boiler does not fire on a hot water or heating demand despite water circulating
  • Repeated lockouts or fault codes linked to water flow not being detected
  • Intermittent operation that varies with pump or flow conditions
  • The flowswitch is sluggish, sticking or slow to respond
  • Visible wear, contamination or damage to the flowswitch assembly during servicing

Before you order

  • Confirm your boiler model against the fitment list above
  • On Eurocombi SX 20 MFFI CE models, check the serial number is at or above the stated range
  • Check the existing part number on the appliance matches 570720
  • Confirm whether your model is the LPG or NG Prog. MEC Edition 1 variant where applicable

Not sure which part?

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