I don’t know about you but it seems like the “replace water filter” light on my fridge is always on. Maybe it is that time goes by just a little faster than I remember but sometimes I wonder if my fridge is a little too high maintenance for its own good. I put the question to an Appliance Technician on JustAnswer to see what he had to say about it.
Much to my chagrin, the fridge isn’t pulling a fast one on me. The technician explained to me that replacing the filter isn’t only important as far as water quality and taste is concerned but it also protects the water inlet valve for your fridge. The water valve is where your water line attaches to your fridge. It is what fills the ice maker and allows the water to dispense at the door when you push the button. Your filter is helping to keep impurities from getting into the water system which also can affect the valve. If gunk gets past a compromised filter, you could have a situation where your valve my stay open or not open at all.
Nowadays most refrigerators now calculate the amount of water that has flowed through the valve so the accuracy of the indicator light is pretty spot on. If your light seems to come on with a high frequency, you probably dispense more water from your fridge than you realize (which is clearly the case in my home).
So we can mark this as TRUE.