The Vaillant 0020140423 Printed Circuit Board (PCB) is a genuine replacement control module that acts as the central command centre for your EcoTEC VU/VU boiler. This control board manages key functions including ignition sequencing, fan and pump operation, sensor input processing and safety interlocks. By coordinating these systems, it ensures smooth, efficient heating and hot-water performance while supporting accurate diagnostics and safe responses to changing demand. If the PCB becomes faulty, boilers often exhibit erratic behaviour, frequent fault codes or complete loss of control, making correct replacement essential for dependable operation.

This printed circuit board is compatible with Vaillant EcoTEC VU and VU series boilers that specify part number 0020140423 in their technical documentation. To ensure correct fitment and reliable performance, always verify the number on your existing PCB or consult your boiler’s service information before installation, as control modules are model-specific and cannot be interchanged between different series.

Supplied ready for direct replacement, the 0020140423 PCB integrates with the boiler’s original wiring harness and sensor interfaces without modification when installed by a qualified engineer. Choosing this genuine Vaillant component helps restore proper system control, improves diagnostic accuracy and contributes to efficient, trustworthy heating and hot water performance in compatible EcoTEC VU/VU boilers.