Carte de commande Avs 55.391 / 109 De Dietrich 710454100

The control board Avs 55.391/109 is an electronic module that manages boiler operations, including ignition, temperature regulation, and safety functions. As a key component of modern heating systems, a faulty board can cause malfunctions. This replacement part restores full functionality, making it indispensable for boiler repair and maintenance.