What is the purpose of this PCB next to air pressure switch? Do I need it?
The board is the device that inturpets the humidity levels from a sensor and turns on the water solenoid, most units also have a flowswitch to turn the system off if there is no air flow. I would want at least an air flow switch controlling the water valve so the system is not flooding the duct work when no air is flowing , I know it is very small amounts of water but over time it candbuild up. Other than flooding the duct I do not think it will cause a problem to bypass the board.