VAILLANT PRINTED CIRCUIT BOARD 0020036861
The printed circuit board or ( pcb ) is the boilers central control. It constantly checks 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 an error in the boilers operation. The printed circuit board is essentially the brains of the appliance, ensuring everything is running correctly and safely.
This part is present in 4 different boilers in the Vaillant range