water leakage on the passenger floor bed when air conditioner on

You more than likely have a plugged A/C drain tube. Just a coat hanger wire should do the trick, it is only a rubber or plastic pipe that exits under the passenger floor area that is usually plugged with leaves etc getting through the intake cowls near your wiper arms. I sometimes just use compressed air to clean out the drain,but I cover the carpet and shut off the panel vents before doing so. here are some shops: https://repairpal.com/subaru-repair-in-winter-park-florida