How often to replace your refrigerator water filter

Replace your refrigerator water filter every six months. Change it sooner if the water or the ice slows down, or if the filter light comes on before then. Some models count gallons alongside the months, so a house that drinks a lot of water hits the limit early.

Whirlpool says to change the filter every six months, when the indicator light comes on, or as needed. If your fridge has no indicator light at all, six months is the plain answer.

LG gives the same general recommendation of every six months, and says to stay closer to six months or go sooner with heavy use, hard water, or a lot of sediment in the water.

GE puts a gallon count next to the months: every six months, or usually after every 170 to 200 gallons of dispensed water, depending on the model.

So: six months, unless your water slowed down first. And your manual beats any schedule on the internet, including this one.

Why manufacturers land on six months

The filter is a cartridge packed with media that grabs things out of the water. LG describes what happens over time: that media gets saturated. Once it is full, it stops doing much.

Leaving a cartridge in past that point does more than stop the filtering. LG says an expired or clogged filter reduces how much it takes out of the water, and a filter neglected for a long time can become a breeding ground for bacteria. Whirlpool points at the other side of it, the part you notice at the dispenser: a clogged filter means smaller ice cubes, less ice, and longer waits for a glass to fill.

Six months is the point where the makers of these fridges stop trusting the cartridge. That is the whole reason for the number.

What the filter light actually tracks

The light is a reminder, not a test. LG says the indicator changes color about every six months. It is going by time and use, not by looking inside the cartridge.

That cuts two ways.

• The light can come on while the water still tastes fine. Change it anyway. Six months has passed, and that is the point of the light.
• The water can slow down before the light ever changes. Change it then, too. Whirlpool says to change the filter sooner if the flow to the dispenser or the ice maker drops noticeably.

After you put the new one in, reset the light. LG calls that out as its own step, and it is the one people skip. An unreset light is a light you stop believing.

Signs your filter is overdue before the light comes on

Both Whirlpool and LG point at the same handful of things:

• A glass takes longer to fill than it used to
• Water pressure at the dispenser feels weak
• Ice cubes come out small, or there are fewer of them
• The water tastes or smells off

Any one of those on a filter you cannot remember changing means change it now. Do not wait for the date.

What to do when the flow drops before six months

Change the filter early. That is all the drop is telling you.

Whirlpool notes that a clogged filter or the wrong filter for your model causes the slow dispensing and the small ice. So check two things: how long the current cartridge has been in, and whether it is actually the right one for your fridge.

If it is clogged and you cannot get a new one today, Whirlpool says you can take the filter out and run the fridge in bypass. The water system keeps working, just unfiltered, until the replacement shows up.

Swapping the cartridge itself is a short job. GE even notes that on their process you do not have to shut the water supply off. Every fridge is a little different, though, so let your manual tell you where the filter lives and how it comes out.

Why a shared house loses track of which filter fits

Swapping the cartridge takes a couple of minutes. Remembering to do it is the part that goes wrong, and nothing in the kitchen helps.

The fridge looks the same with a six-month-old filter as it does with a new one. There is no noise, no puddle, no panel to open. The water gets a little slower over a few months, slowly enough that everyone just adjusts.

Then there is the cartridge itself. Fridge filters are model-specific, and the part number is a string of letters and digits printed somewhere you cannot see once it is installed. So the swap turns into a research project every single time. Somebody stands in front of the open fridge trying to read a number, or digs through order history, or buys the wrong one.

Add a second person and it gets worse. One of you changes it, says nothing, and five months later you both figure the other one is on it.

How to keep the six-month swap from slipping

Tobi’s maintenance log is built for a job on this kind of clock. Your refrigerator becomes a record of a real thing in your home, with its manual link saved on it. “Replace water filter” becomes a task on that record that repeats every six months. Mark it done and the next date moves forward on its own.

A few things that help with this one:

• Save the reorder link for the exact cartridge on the task, so the part number is never a hunt again.
• Every completion is saved with the date, who did it, and notes, so “reset the light” or “flow was already slow at month four” stays attached to the fridge.
• Nothing gets written over, so you can see whether your filters are running short and need a shorter interval.
• Tobi reminds you the day it is due, and again the next day if it is still not done.

Everyone in the household sees the same record on their own phone, in real time. So the filter shows as due for the whole house, and once someone does it, it is done for everyone. One subscription covers the household and only the owner pays.

Where the water filter fits with the rest of your home maintenance

A fridge filter is one of a dozen small jobs in a house that come back on their own clocks, like the furnace filter every one to three months. The home maintenance schedule that actually survives real life puts them in one place.

Go look at your fridge tonight. Find the filter, write down the part number, and pick a date six months out.