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Vaillant Vortex Sensor 0020045977

Vaillant

Vaillant Vortex Sensor 0020045977

Vortex sensor, part 0020045977, for Vaillant VU 466/4-5 and VU 656/4-5 Ecotec boilers.

At a glance

  • Also known as 1381526
Manufacturer part no.
0020045977
Showing prices

£147.18

£122.65 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 Vaillant vortex sensor (part 0020045977) is a fan assembly component used on VU 466/4-5 and VU 656/4-5 appliances. It sits within the fan and impeller arrangement, where it monitors the vortex of air movement produced by the impeller. Its signal allows the boiler's control system to confirm that the fan is running and that combustion air is being drawn correctly.

Signs this part needs replacing

  • The boiler locks out or fails to fire, with the fan running but not being recognised by the control board
  • Fan-related fault codes appearing intermittently or repeatedly
  • Increased noise or vibration from the fan area during start-up or running
  • Visible contamination, damage or distortion around the sensor or impeller
  • The fan runs continuously or at an incorrect speed because the vortex signal is not being read

Before you order

  • Check the appliance rating plate to confirm the model is a VU 466/4-5 or VU 656/4-5
  • Confirm the part number 0020045977 against the component currently fitted
  • Establish whether the fault lies with the sensor or with the fan motor and impeller assembly as a whole
  • Isolate the appliance from the electrical supply before any inspection or replacement work

Not sure which part?

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