Most ice makers use filtered water, but the path depends on your model

Whether your ice maker's water goes through your refrigerator's filter depends on how it's plumbed. In most modern refrigerators, the ice maker does draw from the same filtered water line that supplies your water dispenser — the water passes through the refrigerator's filter before reaching the ice maker. However, some older models and certain configurations bypass the filter entirely, sending unfiltered water directly to the ice maker. The only way to know for certain is to check your refrigerator's manual or trace the water line behind the unit.

Key Takeaways

  • Most refrigerators made in the last 15 years route ice maker water through the same filter that supplies the water dispenser.
  • Some models have a separate, dedicated filter for the ice maker, or no filter at all on the ice maker line.
  • You can find out by checking your refrigerator's manual, looking at the water line diagram inside the fridge, or calling the manufacturer with your model number.
  • If your ice maker uses filtered water, you need to replace the filter on the same schedule as you would for the water dispenser — typically every 6 months.
  • Unfiltered ice can taste stale or cloudy and may contain sediment, so filtered water is preferable if your model allows it.

How water reaches your ice maker in a filtered system

In a filtered setup, water enters your refrigerator from the main supply line, passes through the refrigerator's filter cartridge (usually located in the upper right corner of the fridge or in the base grille), and then splits into two paths: one to the water dispenser and one to the ice maker. Both use the same filtered water. This is the most common design in refrigerators made by LG, Samsung, Whirlpool, and GE from roughly 2008 onward.

The filter removes sediment, chlorine, and some odors from the water before it reaches either outlet. If your ice tastes off or your water dispenser flow slows down, a clogged filter affects both systems equally. You'll notice the problem in both places at the same time.

Models that bypass the filter or use separate filters

Not all refrigerators route ice maker water through the main filter. Some older models send unfiltered water directly to the ice maker while filtering only the water dispenser line. Others have a dedicated filter cartridge just for the ice maker, separate from the one serving the water dispenser. A few budget models have no filter on either line.

Side-by-side refrigerators are more likely to use a shared filter system, while French-door models vary. Compact or under-counter ice makers often have their own small filter or none at all. If you're unsure, the easiest way to find out is to look at the diagram printed on the inside of your refrigerator door or on the back wall — it usually shows the water line path and where filters sit.

How to learn about your ice maker is filtered

Start by locating your refrigerator's model number, usually found on a sticker inside the fridge (often on the side wall or top shelf) or on the back of the unit. Write it down, then search online for "[Your Brand] [Model Number] manual" or visit the manufacturer's website directly. Most manuals include a water system diagram that shows whether the ice maker line passes through a filter.

If you can't find the manual online, call the manufacturer's customer service line with your model number. They can tell you in under a minute whether your ice maker uses filtered water. You can also look behind the refrigerator and trace the water line from the wall connection — if it goes to a filter cartridge first, then splits, your ice maker is filtered. If the line goes straight to the ice maker without passing through a filter housing, it's unfiltered.

What happens if your ice maker uses filtered water

If your ice maker draws from the filtered line, the filter cartridge does double duty: it cleans water for both your dispenser and your ice maker. This means the filter clogs faster than it would if serving only the water dispenser, because the ice maker runs continuously (especially if you use ice frequently) while the water dispenser is used on demand.

You should replace the filter on the same schedule recommended by the manufacturer — typically every 6 months, though some sources suggest every 12 months depending on your water quality and usage. If you notice your ice cubes look cloudy, taste stale, or have a faint odor, or if your water dispenser flow slows down, the filter is likely due for replacement. A clogged filter reduces water pressure to both systems, so you may see slower ice production as well.

Why filtered ice matters

Unfiltered water can produce cloudy or discolored ice cubes because sediment and minerals freeze along with the water. The ice may also absorb odors from your freezer or taste like chlorine if your tap water is heavily chlorinated. Filtered water produces clearer, better-tasting ice and helps prevent mineral buildup inside the ice maker's water valve and lines.

If your model bypasses the filter for the ice maker, you can't change that without replacing the refrigerator or installing an external filter system (which is rarely practical). The best you can do is keep the refrigerator clean and replace the water filter on schedule to maintain the quality of your water dispenser, and accept that your ice will be unfiltered.

Replacing the filter when your ice maker is on the filtered line

Most refrigerator filters are straightforward to replace and take less than five minutes. The cartridge usually twists out counterclockwise or slides out of a housing. Before you remove the old filter, turn off the water supply to the refrigerator (there's usually a shutoff valve under the sink or behind the fridge). After inserting the new filter, run water through the dispenser for 30 seconds to flush air from the line, then run the ice maker through a cycle or two to clear the line.

Keep the old filter's part number or take a photo of it so you can order the exact replacement. Generic filters are cheaper but may not fit as well or filter as effectively as the manufacturer's cartridge. Check your manual for the correct part number and replacement interval.

Frequently Asked Questions

Can I use unfiltered water in my ice maker if it's designed for filtered water?

Technically, yes — if your ice maker is on the filtered line, it will still make ice if the filter is removed or clogged. However, you'll get cloudier ice and may damage the water valve over time if sediment builds up. It's better to replace the filter on schedule.

Why is my ice cloudy if I have a filter?

Cloudy ice usually means the filter is clogged and water is not flowing through it properly, or the filter was never installed. It can also happen if air is trapped in the water line — run the water dispenser for 30 seconds to purge it. If the filter is new and the ice is still cloudy, the filter may not be seated correctly.

Does a clogged ice maker filter affect my water dispenser?

Yes, if they share the same filter. You'll notice slower flow at both the dispenser and the ice maker. Replace the filter and the flow should return to normal within a few minutes.

What if my refrigerator manual doesn't show the water system diagram?

Contact the manufacturer's customer service with your model number. They can confirm whether your ice maker is filtered and provide the correct filter part number if it is.