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Vaillant Thermostat Cylinder Controls Cut Off 0020127605

Vaillant

Vaillant Thermostat Cylinder Controls Cut Off 0020127605

Cylinder control cut-off thermostat for Vaillant auroSTOR VIH S GB 210/2 S, 260/2 S and 310/2 S unvented cylinders.

At a glance

  • Also known as 1385241
Manufacturer part no.
0020127605
Showing prices

£155.41

£129.51 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 Vaillant cylinder controls cut-off thermostat (part number 0020127605) is a safety limit thermostat used within the control set of auroSTOR VIH S GB unvented hot water cylinders. It monitors stored cylinder temperature and interrupts the call for heat if the cylinder exceeds its set limit, preventing the cylinder from overheating. It is a serviceable control component rather than a boiler-mounted part.

Signs this part needs replacing

  • Stored hot water temperature rising above the set point
  • Boiler continuing to fire after the cylinder has reached temperature
  • Cut-out operating repeatedly and requiring manual reset
  • Water at the taps noticeably hotter than the cylinder thermostat setting
  • No change in cylinder control behaviour when the set point is adjusted

Before you order

  • Confirm the cylinder model from the data badge — this part is listed for auroSTOR VIH S GB 210/2 S, 260/2 S and 310/2 S units.
  • Check the part number on the existing thermostat matches 0020127605.
  • Confirm the fault lies with the cut-off thermostat rather than the cylinder thermostat or the cylinder control wiring.

Not sure which part?

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