The printed circuit board (PCB) is the control centre of the appliance. The PCB oversees every process that occurs throughout the system via the switches, sensors and thermostats.
This part 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 processes eg. high pressure or low water levels
The printed circuit board is essentially the brain of the boiler, it is programmed to ensure everything is running as it should.
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