If your car seat adjuster is not working properly, there are a few things you can do to fix it. First, check to see if the adjuster is loose or if it is stuck in the hole on the side of the seat. If it is stuck, try moving it around until it feels free. If the adjuster is loose, tighten it with a screwdriver or pliers. If the adjuster still does not work properly, you may need to replace it.