The Vaillant 0020148034 is a genuine OEM expansion valve coil designed for use with compatible Vaillant aroTHERM and VWL air source heat pump systems. This electrical coil operates the thermal expansion valve (TXV/TEV), regulating refrigerant flow in response to system demand to ensure efficient heat transfer and stable heat pump performance.

A failing coil can cause incorrect refrigerant metering, leading to poor heating output, icing, system errors, unstable performance, or complete heat pump shutdown. Replacing it with this genuine Vaillant component restores accurate valve operation and long-term reliability.

Key Features:

• Genuine Vaillant expansion valve coil

• Operates the TXV to regulate refrigerant flow

• Ensures efficient heat transfer and system stability

• Designed for aroTHERM & VWL heat pump models

• Helps resolve icing, low output, pressure faults & system lockouts

• Manufactured to Vaillant’s strict OEM electrical and mechanical standards

• Durable, reliable, and built for long service life

• Direct-fit replacement for professional installation

Compatibility

The Vaillant 0020148034 Expansion Valve Coil is compatible with:

• Vaillant aroTHERM air source heat pumps

• Vaillant VWL heat pump models

• Any Vaillant system listing 0020148034 in its official parts documentation

Installers should always confirm exact compatibility using the heat pump’s service manual or parts list.