In most refrigerators a single cartridge serves the drinking water dispenser and the ice maker, which means the ice is consuming the same media as the water and the two share every fault. That has consequences for how long the cartridge lasts and for how to tell whether a problem is the water, the filter or the appliance.
Ice consumes more of the cartridge than people expect
An ice maker refills its mould repeatedly through the day whether or not anyone takes ice, so a household that rarely uses the dispenser can still exhaust a cartridge on schedule. That is worth knowing when judging a filter's life against the manufacturer's figure, which assumes a certain volume rather than a certain number of glasses. If a household wants a cartridge to last longer, using the ice maker less does more than drinking less.
Faults that look like water problems
Slow dispensing and small or hollow ice cubes are usually the cartridge or the supply rather than the appliance, since a loaded filter restricts the flow both functions depend on. Cloudy ice is normally dissolved air and minerals rather than contamination. Ice that tastes of food is a freezer storage problem: ice absorbs odours, so keeping it in a closed container and discarding old ice fixes what no filter can. And a dispenser that has stood unused for days gives stale water from the line rather than bad water.
Changing it properly
Change on the manufacturer's rated volume or interval rather than the indicator light, which on most appliances is a timer that knows nothing about how much water has passed. After fitting, run several litres through the dispenser and discard at least the first two batches of ice, because carbon fines and trapped air produce grey water and cloudy ice initially. Write the date somewhere, since the appliance will not remember for you and an out of sight cartridge is easily forgotten.
What the cartridge can and cannot do
It is a small carbon filter, so it addresses chlorine taste and odour and, where the model is certified for it, specific contaminants such as particulate lead or cysts. It does not soften water, so ice from hard water will still be cloudy and the appliance will still scale. If a laboratory result found something specific, check the cartridge's certification names it rather than assuming. Our fridge filter guide covers matching cartridges by part number.
Questions people ask about ice and water refrigerator filter
Does the ice maker use the same filter?
In most refrigerators yes, one cartridge serves both, so ice consumes cartridge life even when nobody uses the dispenser.
Why are my ice cubes small or hollow?
Usually restricted flow from a loaded cartridge or the supply, rather than a fault in the ice maker itself.
Should I trust the filter indicator light?
On most appliances it is a timer rather than a measurement, so change on rated volume and note the date yourself.
Why does my ice taste of food?
Ice absorbs odours from the freezer. Keep it covered and discard old ice; no water filter addresses that.