The Vaillant 0020143502 is a genuine OEM temperature sensor designed for selected Vaillant ecoTEC VU system and ecoTEC VUW combi boilers. This sensor provides accurate temperature monitoring within the system, helping the boiler modulate efficiently, maintain stable operation, and deliver consistent heating and hot water performance.

A faulty sensor may cause fluctuating temperatures, intermittent operation, inaccurate readings, error codes, or boiler lockouts. Replacing it with this genuine Vaillant component restores precise monitoring and reliable performance.

Key Features:

• Genuine Vaillant temperature sensor

• Designed for ecoTEC VU & VUW boilers

• Provides accurate system temperature readings

• Ensures efficient modulation & consistent performance

• Manufactured to Vaillant’s strict OEM quality standards

• Helps resolve temperature faults, modulation issues & error codes

• Durable and highly reliable

• Direct-fit replacement for professional installation

Compatibility

The Vaillant 0020143502 Sensor is compatible with:

• Vaillant ecoTEC VU system boilers

• Vaillant ecoTEC VUW combi boilers

• Any Vaillant model listing 0020143502 in its official parts documentation

Engineers should always verify exact compatibility using the boiler’s model-specific service manual or wiring diagram.