Genuine Daikin 142330J Horizontal Vane is the lower swing louvre that directs conditioned air up or down as it leaves the indoor unit. When it cracks, warps, or loses its drive it can stop swinging, rattle, or sit at the wrong angle and misdirect the air. The genuine vane is moulded to the unit's exact swing geometry, moving smoothly and aiming the air as designed where a generic can bind or sit askew.