vaso expansion caldera vaillant 181057 plástico resistente Burning smell or burn marks

Burning smell or burn marks in the resistance area

HBN539E3T/02 BOSCH

SN26M890EP/19 BSH

Prevents the boiler from overpressurizing and activating the safety valve

vaso expansion caldera vaillant 181057 plástico resistente Burning smell or burn marksThe expansion vessel is a key component in boilers that allows absorption of pressure variations caused by the expansion of hot water in the heating circuit. This Vaillant 181057 model, with a capacity of 10 liters and a maximum pressure of 3 bar, is designed to maintain stable internal pressure and prevent damage to the boiler and pipes. What problem does this replacement part solve? Unstable or fluctuating pressure in the boiler during operation.