Product review (1 stars): Shipped Wrong Model
I ordered two packs of LG 5231JA2006A in August 2014.  When I replaced the filter today, I noticed that the water coming out of refrigerator was dark color which was quite scary!!  Then I looked at the package again, what was shipped to me was actually LG 5231JA2006B!!  They look almost identical as 5231JA2006A, which was why I didn't notice they shipped me the wrong model in the first place.  But now as 5 months passed by, I couldn't return it for a change. Based on the water color, 5231JA2006A and 5231JA2006B are totally NOT interchangable.