The Baxi 7684478 is a genuine OEM combustion control unit designed for selected Baxi 24 kW combi boilers. This key electronic module manages burner operation, combustion quality, ignition, gas modulation, and safety functions—ensuring efficient, clean, and reliable boiler performance.

A failing combustion control unit can lead to issues such as ignition failure, poor modulation, fluctuating hot water temperature, burner instability, incomplete combustion, error codes, or full system lockouts. Replacing it with this genuine Baxi component restores proper combustion management and dependable boiler operation.

Key Features:

• Genuine Baxi combustion control unit

• Manages ignition, burner operation & gas modulation

• Ensures safe and efficient combustion in 24 kW combi boilers

• Helps resolve ignition issues, modulation faults & combustion errors

• Manufactured to strict Baxi OEM standards

• Durable electronic design for long-term reliability

• Direct-fit replacement for fast and professional installation

Compatibility

The Baxi 7684478 Combustion Control Unit is compatible with:

• Selected Baxi 24 kW Combi models

• Additional boilers across the Baxi Group listing 7684478 in their official parts documentation

Common boiler families may include:

• Baxi Combi (24 kW variants)

• Main Eco Combi (24 kW)

• Potterton Promax Combi (24 kW)

Installers must always verify exact model compatibility using the boiler’s service manual or wiring schematic.