Teresa Phillipson for Model Number Frigidaire Model FRS6R4EW0 We have been using replacement water filter cartridge WF284 Aqua Fresh PureSourcePlus. I wanted to test our water to see how effective the filter is. I have a TDS Tester, the closer the reading is to 0 the better the water. I tested the water prior to replacing the cartridge, which has been in the fridge for about 5 months. Note: This is a work fridge. The number came up to about 170 which indicated the water is hard. I then replaced the cartridge with a new one and ran 4 pitchers full of water through. I ran the water test again, and the reading was the same - no improvement after replacing the water cartridge. 1. Am I using the right replacement cartridge? 2. Is the fridge so old it's no longer filtering properly? Also, I found two little rubber nuts on shelf in fridge. I have looked up the parts drawings, but can't identify what they are. They are about 3/8 in diameter with a tiny hole in middle about the size of a push pin needle. I have a picture which I can send to you. Thanks, Teresa Phillipson 870-425-3444 Mountain Home, AR
Answer Teresa, What you are testing the water for is water hardness in which the water hardness will not change by going through the filter. The water hardness will be for the amount of calcium in the water which is what creates the hardness. Read More... Answered by AppliancePartsPros.com | Friday, June 15, 2018