The Vaillant 0020143478 Burner is a genuine replacement combustion assembly engineered to deliver the correct mix of gas and air into your boiler’s combustion chamber. This ensures stable ignition, efficient burning and consistent heat output. As the heart of the combustion process, the burner plays a vital role in helping your boiler achieve reliable performance and optimal fuel efficiency. When a burner becomes worn, damaged or clogged, symptoms such as poor combustion, flame instability, increased noise or boiler fault codes can occur, so fitting the correct OEM replacement is essential for restoring dependable operation.

This burner is compatible with Vaillant boilers that reference part number 0020143478 in their service and parts documentation. To ensure correct fitment and performance, always verify that your existing part number matches before installation, as burner designs and gas mixing requirements vary between models and output ratings.

Supplied ready for direct replacement, the 0020143478 Burner integrates with your boiler’s existing gas supply, ignition electrodes and mounting points without modification when installed by a qualified engineer. Choosing this genuine Vaillant component helps restore proper combustion, improve ignition reliability and support consistent heating and hot-water performance in compatible boilers.