Vaillant
Vaillant NTC Sensor 256803
NTC temperature sensor, part 256803, for Vaillant Mag CAR 11-2/0 and 14-2/0 water heaters.
At a glance
- Part type: NTC temperature sensor
- Appliance family: Mag CAR water heaters
- Also known as 1387446
£9.67
£8.06 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Vaillant 256803 is an NTC temperature sensor used in Vaillant Mag CAR water heaters. It provides the temperature signal the appliance control uses to regulate the heating circuit. It is listed for the Mag CAR 11-2/0 and 14-2/0 ranges built between 2006 and 2010.
Signs this part needs replacing
- Temperature readings that do not match the actual water temperature
- The appliance cutting out or failing to modulate as it should
- Fault codes relating to the temperature sensor circuit
- Intermittent or unstable hot water output
- Sensor resistance readings outside the expected range for the appliance
Before you order
- Confirm your appliance model against the fitment list above
- Check the part number on the existing sensor before removing it
- Check the sensor connector and lead for damage before fitting a replacement
- Verify the fault is with the sensor rather than the wiring or control board
Compliance
| Alternative numbers | 1387446 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT Mag CAR 11-2/0 (2006-2007) | — | — | — | |
| VAILLANT Mag CAR 11-2/0 R1 (2007-2010) | — | — | — | |
| VAILLANT Mag CAR 14-2/0 (2006-2007) | — | — | — | |
| VAILLANT Mag CAR 14-2/0 R1 (2007-2010) | — | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.