Ice is food. It melts into everything you drink, and it is honest in a way tap water sometimes is not: the glass of water you gulp may hide a stale taste, but the cube that slowly melts into your drink announces it. That is why the ice maker is usually the first place a worn-out filter shows itself. This guide explains how the water in your ice maker is actually filtered, how to read the signs your cubes are giving you, and what the fix looks like. It is a shorter answer than most people expect.
One Cartridge Usually Feeds Both the Water and the Ice
Here is the fact this page hangs on: on most refrigerators that have both a water dispenser and an automatic ice maker, a single internal filter cartridge supplies both. The water line comes into the fridge, passes through the cartridge, and only then splits toward the dispenser and the ice maker. There is rarely a separate “ice filter” hiding somewhere else in the machine. Manufacturers describe their cartridges exactly that way — the genuine EveryDrop Filter 1, the EDR1RXD1, is sold as an ice and water filter, a carbon-block cartridge certified to CSA B483.1 and NSF/ANSI Standards 42, 53 and 401 per its product page.
The hedge belongs here, because designs vary: a few models route things differently, and a fridge with an ice maker but no dispenser may be plumbed another way again. Your manual’s water-line diagram is the final authority for your model. But as a working rule: one filter compartment means one cartridge standing guard over every cube you make.
Why a Spent Filter Ruins Ice First
A refrigerator cartridge is a block of activated carbon, and carbon works by adsorption: contaminants stick to its surface as water passes through. Over its rated life — the EDR1RXD1’s product page rates it at 6 months and 200 gallons — that surface gradually fills up. As it does, two things happen that ice exposes mercilessly.
First, taste breaks through. Chlorine and the compounds behind stale, swampy flavours stop being captured in full. In a glass of water you might not notice; in a cube that melts slowly into a drink, you do. Second, flow slows. A loaded cartridge passes water more reluctantly, and an ice maker fed a thin stream makes thin cubes — small, hollow or shell-like — because each mould cavity never quite fills before the freeze cycle ends. Ice is, in effect, a slow photograph of your water quality and your water pressure, taken fresh every few hours.
One honest exception: cloudiness alone is not always the filter’s fault. Ice freezes from the outside in, and air and minerals naturally present in the water get pushed toward the centre of the cube, which is why even well-filtered water can freeze a little cloudy in the middle. Cloudiness plus off taste, shrinking cubes or slow production is the pattern that points at the cartridge.
Reading Your Cubes: The Signs Table
| What the ice looks like | What it usually means | First move |
|---|---|---|
| Clear, solid, normal size, no taste | Filter and supply both healthy | Nothing — enjoy |
| Cloudy or white centres, but tastes clean | Often just air/minerals trapped as the cube freezes; can be harmless | Watch it; act if taste or size changes too |
| Hollow, thin-shelled or small cubes | Low flow to the ice maker — a classic sign of a loaded, overdue cartridge | Change the filter; check flow after |
| Cubes shrinking in the bin over days | Slow production plus normal evaporation of stored ice; production is not keeping up | Change the filter if it is due or overdue |
| Off taste or odour in the cubes | Carbon is spent and no longer capturing taste compounds | Change the filter, then flush and discard the first ice (below) |
| Production has slowed noticeably | Restricted flow anywhere in the line — filter is the most common and cheapest suspect | Change the filter before calling a technician |
Our companion guide to how often to change a fridge water filter covers the calendar side of this — the intervals, the indicator lights, and why the date alone is a backstop rather than the trigger.
The Fix: Change, Flush, and Throw the First Ice Away
Replacing the cartridge follows the usual pattern — our full refrigerator water filter replacement walkthrough covers every housing style step by step. The two steps that matter specifically for ice:
- Flush the new cartridge. Run the dispenser and discard the water — the EDR1RXD1’s product page specifies flushing about 4 gallons — to clear air and loose carbon fines from the new block. Skipping this sends that first cloudy flush water straight to the ice moulds.
- Discard the first batch of ice. The first cubes made after a change can carry carbon dust and the stale water that sat in the line. Bin them. The second batch is the one your new filter actually made from fresh water.
After that, give the ice maker a day. Production speed and cube size recover as full flow returns, and taste should be clean from the second batch onward. If hollow cubes persist with a fresh, genuine cartridge correctly seated, the restriction is elsewhere in the line — at that point the manual, and possibly a technician, earn their fee.
Ice-Only Setups: Inline Filters Are a Separate Category
Some ice makers have no fridge cartridge at all: a standalone ice maker, or a fridge with an ice maker but no internal filter, is sometimes fed through an inline filter — a small cartridge plumbed into the water line behind the appliance. That category exists and works on the same carbon principle, but be clear about what it is: a different part, bought and sized for the line rather than the fridge, on its own replacement rhythm. Our store’s range is internal refrigerator cartridges, so if your setup needs an inline filter, that is a separate purchase — and the same discipline applies: buy by specification and certification, and change it on schedule.
What a Genuine Ice-and-Water Cartridge Costs
If your fridge is one of the Whirlpool-family models the EDR1RXD1 serves — it replaces part numbers including W10295370A, W10790813 and Kenmore 9081, per its product page — the genuine cartridge is $39.99 one-time at Discounted Filter Store, with free US shipping on any order amount. The official EveryDrop store charges $59.99 one-time, or $48 only with a subscription; Filters Fast ships free only at $99+ and Discount Filter at $70+. Orders are processed within 1–2 business days and delivered in 3–5 business days via USPS, and unopened filters return within 30 days, free, with a prepaid label.
Frequently Asked Questions
Does my ice maker have its own separate filter? Usually not. On most fridges with a dispenser and an ice maker, one internal cartridge feeds both — the genuine EveryDrop Filter 1 is literally sold as an ice and water filter. A few models differ, so your manual’s water-line diagram is the final authority.
Why does my ice taste worse than my tap water? Because ice melts slowly into your drink, releasing whatever a spent filter no longer captures, steadily, over the full drinking time — and a loaded cartridge also starves the ice maker of flow. Bad ice alongside acceptable-tasting tap water is a classic early sign the cartridge is spent.
Is cloudy ice dangerous? Cloudiness by itself is usually just air and minerals trapped as the cube freezes from the outside in — harmless. Treat it as a filter symptom when it arrives with off taste, hollow or shrinking cubes, or slowing production.
Why are my ice cubes hollow or getting smaller? Hollow and small cubes usually mean low water flow into the moulds, and the most common cause is a loaded, overdue filter cartridge restricting the line. Change the cartridge first; it is the cheapest and most likely fix.
Should I throw away the first ice after changing the filter? Yes. Flush the new cartridge at the dispenser first (about 4 gallons on the Filter 1 page’s instructions), then discard the first batch of ice — it can carry carbon fines and stale line water. The second batch onward is your new filter’s real work.
My fridge has no internal filter. Can I still filter the ice maker’s water? Yes — inline filters exist as a separate category, plumbed into the water line feeding the appliance. They are a different part from fridge cartridges (which are what we sell), with their own sizing and replacement rhythm; buy by specification and certification, as with any cartridge.