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Ariston Overheat Thermostat 571648

Ariston

Ariston Overheat Thermostat 571648

Overheat thermostat for Ariston Genus 27 BFFI UK gas boilers.

At a glance

  • Part type: overheat thermostat
  • Appliance family: Genus 27 BFFI UK
  • Also known as 1572976
Manufacturer part no.
571648
Showing prices

£12.10

£10.08 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 overheat thermostat is a safety device fitted to Ariston Genus 27 BFFI UK gas boilers. It monitors boiler temperature and interrupts the burner circuit if the appliance overheats, preventing damage to the heat exchanger and associated components. This is the Ariston part numbered 571648.

Signs this part needs replacing

  • Boiler locks out repeatedly, particularly after running for a period.
  • Overheat trip that will not reset, or resets only briefly before tripping again.
  • No continuity across the thermostat terminals at ambient temperature when tested.
  • Burner cuts out before the boiler reaches its normal operating temperature.
  • Fault code or lockout pattern on the appliance pointing to an overheat condition.

Before you order

  • Confirm the boiler model is an Ariston Genus 27 BFFI UK.
  • Check the appliance serial number against the ranges listed above.
  • Verify the existing thermostat's part number or markings before ordering.
  • Confirm whether the appliance is the NG or LPG variant, as both are covered by this part.

Not sure which part?

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