ActronAir Indoor Coil Inlet Sensor 7.5m 2-Pin JST Connector monitors the temperature at the indoor coil inlet on Advance R32 and AIRES residential split ducted systems, providing the entering-air temperature data the control algorithm uses to optimise coil performance and regulate capacity modulation. The 7.5m cable length -- more than six times longer than the standard 1.2m sensors -- is required for indoor units where the PCB is located at significant distance from the coil sensing point in large cabinet configurations. Isolate power at mains before replacing coil temperature sensors.