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Vaillant 0020034604 printed circuit board
Product Code: 500001
The printed circuit board or (PCB) is the control centre of the appliance. It controls and monitors every process that occurs via the thermostats, switches and sensors . It also enforces the safety measures, making sure that the boiler ceases to function if any of the internal readings point to any fault in the boilers operation. The printed circuit board is essentially the brains of the appliance, ensuring everything is running correctly and safely.