Vaillant 0020034604 printed circuit board

A genuine Vaillant printed circuit board for THERMOcompact VU (fan-assisted), TURBOmax VUW (fan-assisted) and aquaPLUS VUI (fan-assisted) boilers. The control centre of a boiler, the printed circuit board (PCB) monitors and controls every process occurring throughout a system via switches, thermostats and sensors. It enforces safety measures too, shutting down boiler functions if internal readings indicate any fault such as high pressure or low water levels.