ActronAir Resistor 1/4 Watt is a small-signal resistor for ActronAir PCB control circuits, used in low-power signal conditioning and voltage divider applications on indoor and outdoor control boards. Confirm the resistance value from the board's service documentation before ordering -- the 1/4W power rating limits this component to low-current signal circuits only. Isolate power at mains before replacing any PCB circuit components.