Water filter replacement

Sounds like the dual solenoid water control vave. Located in the back it will have two wire connectors going to solenoids. They are replaced as a pair and most local appliance dealers have universal replacemants. http://www.lg.com/us/refrigerators/lg-LSC26905TT-side-by-side-refrigerator

http://www.searspartsdirect.com/partsdirect/part-model/LG-Parts/Refrigerator-Parts/Model-LSC26905TT/3204/0165000/50031613/00005

have you purges the new filter of air for at least 3 minutes? did you remove the protective plastic cover covering the "O"-ring on the filter inlet end?

When you put in a new water filter on you should run the water for about 5 min.Hope this helps

You can get the filter on the links below.

http://www.bestbuy.com/site/LG+-+Replacement+Water+Filter+for+Select+LG+Refrigerators/6817484.p?id=1118840200017&skuId=6817484

http://www.purewatersite.com/lg-lt500p-refrigerator-fil500.html

Good Luck

Check out this link, its a video that shows you how to replace the water filter.

http://www.youtube.com/watch?v=YRsvfaKABLI

For LG LSC26905:

If you replaced the water filter cartridge on the dispenser due to a filter replacement indicator appeared on the display, press and hold the lock button more than 3 seconds to reset the filter timer.

Make sure the water supply line is open.

The filter will come out attached to the cover .. look inside the cavity . there should be a space there for the filter .. the ones at the top of the fridge are quite small compared to the ones that go at the bottom on some fridges. Most appliance or building supply stores will have replacement filters on hand .. have your make and model number to get the correct replacement., or the old filter ..

locate water filter bracket(normally in fridge compartment), then use screwdriver to remove from the frame. You will see two plastic pipes connected to this bracket. one will be water in and the other water out. pull the two off the bracket and join them together. (be inventive). Connect your RO system to the main inlet after original water supply is removed. Remember, your "filter to be replaced" light will still flash after a period as the fridge has its own software, counting depressions for cartridge replacement. (you would painstakingly have to reset.}

The effort it would take to eliminate filter would be too much. Just leave filter in place. If new house filter is working right you should never have to replace fridge filter and your water will be double-filtered :)