The Vokera ignition module printed circuit board is the boiler's central control. It oversees every process that occurs through the thermostats, sensors, and switches. It also enforces the safety parameters, making sure that the boiler ceases to function if any of the internal readings point to an error in the boiler's processes. The Printed Circuit Board is effectively the brain of your boiler. It is programmed to ensure everything is running as it should.