The eductor assembly is plugged. This is where the brine is drawn in to regenerate the system. It is the space capsule looking thing on the left side of valve. The owners manual has directions to repair this. You may find your manual here. http://products.geappliances.com/ApplProducts/Dispatcher?REQUEST=SpecPage&Sku=GXSF30H RJ
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The eductor assembly is plugged. This is where the brine is drawn in to regenerate the system. It is the space capsule looking thing on the left side of valve. The owners manual has directions to repair this. You may find your manual here.
http://products.geappliances.com/ApplProducts/Dispatcher?REQUEST=SpecPage&Sku=GXSF30H
RJ