Clean your ice maker every three to six months, or monthly if you have hard water
Most ice makers need a cleaning cycle every three to six months to prevent mineral buildup, mold, and bacterial growth inside the machine. If you have hard water — water with high calcium and magnesium content — clean monthly instead. The exact interval depends on your water quality, how often you use the machine, and whether your ice maker has a built-in filter.
The reason is straightforward: water sits in the ice maker's lines and reservoir, and minerals, algae, and bacteria accumulate there even though you cannot see them. A machine that looks clean on the outside can have a grimy interior. Running a cleaning cycle flushes out these deposits and keeps the ice tasting fresh.
Key Takeaways
- Clean your ice maker every three to six months under normal conditions, or monthly if you have hard water or notice ice smells or tastes off.
- Most ice makers come with a cleaning mode you set up by holding a button or pressing a menu option — check your manual for the exact steps.
- You will need a commercial ice maker cleaner (not vinegar or bleach) that is safe for food contact surfaces; the manufacturer often sells their own brand.
- If your ice maker has a water filter, replace it every six months or according to the manual, as a clogged filter forces the machine to work harder and reduces cleaning effectiveness.
- If ice tastes bad, smells musty, or the machine stops making ice, clean it when ready rather than waiting for the scheduled interval.
Signs your ice maker needs cleaning right now
Do not wait for the three-month mark if you notice any of these problems. Ice that tastes metallic, stale, or like plastic is a sign minerals or mold are present. A musty or sour smell coming from the ice bin means bacteria are growing inside. Cloudy ice instead of clear ice suggests mineral deposits are forming in the water lines.
If the machine slows down and makes ice more slowly than it used to, mineral buildup is restricting water flow. If it stops making ice altogether, a clogged line or frozen water passage may be the cause — cleaning often fixes this. In all these cases, run a cleaning cycle before calling a repair technician.
How to run a cleaning cycle on your machine
Most ice makers have a built-in cleaning mode. Look for a button labeled "Clean," "Cleaning," or "Maintenance" on the front panel or inside the door. Some machines require you to hold the button for three to five seconds; others have a menu you navigate with arrow buttons. Check your manual for the exact sequence — manufacturer websites often have PDFs you can read if you lost the paper copy.
When you start the cleaning cycle, the machine will prompt you to add cleaning solution to the water reservoir or a designated cleaning port. Use only commercial ice maker cleaner made for food contact surfaces — brands like Affresh, Ice-O-Matic, or Manitowoc make cleaners designed for their machines. Do not use vinegar, bleach, or general-purpose cleaners, which can damage seals and leave residue that taints ice.
The cycle usually runs for 15 to 30 minutes and flushes the cleaner through all the internal lines and the ice-making mechanism. When it finishes, the machine will beep or display a message. Empty the ice bin and run two to three cycles of plain water to rinse out any remaining cleaner before making ice again.
Replacing the water filter on schedule
If your ice maker has a water filter — many built-in and countertop models do — replace it every six months or according to your manual. A clogged filter forces water through more slowly, which can cause the machine to shut down mid-cycle or make smaller ice cubes. It also reduces the effectiveness of cleaning cycles because water cannot flow freely through the lines.
Filters are usually located behind a panel on the front or back of the machine. To replace one, turn off the water supply to the ice maker, unscrew or unclip the old filter, and screw in the new one hand-tight. Turn the water back on and run water through the machine for 30 seconds to flush air from the line. If you are unsure where the filter is or how to remove it, your manual will have a diagram.
What happens if you skip cleaning
Mineral deposits build up in the water lines and the freezing mechanism, making the machine work harder to produce ice. Over time, this reduces ice production and can cause the compressor to fail — a repair that costs several hundred dollars. Bacteria and mold grow in the stagnant water inside the reservoir and lines, which is why ice starts to smell or taste bad.
In worst cases, a severely clogged machine stops making ice entirely and requires professional descaling or replacement of internal components. Regular cleaning prevents all of this and extends the life of the machine by years.
Cleaning between scheduled cycles
You can clean the removable parts of your ice maker without running a full cleaning cycle. Empty the ice bin regularly — do not let ice sit for weeks — and wipe the bin with a damp cloth. If your machine has a removable water reservoir, empty it, rinse it with hot water, and refill it with fresh water every month.
Wipe the exterior and the ice chute with a soft cloth. If you see algae or slime on the inside of the bin or chute, that is a sign the machine needs a full cleaning cycle sooner than scheduled. Do not use abrasive scrubbers or harsh chemicals on any part of the machine, as these can scratch surfaces and damage seals.
Hard water and mineral buildup
If your water is hard — meaning it has high levels of dissolved minerals like calcium and magnesium — your ice maker will accumulate deposits much faster than normal. You can test your water hardness with an inexpensive test strip from a hardware store, or ask your local water utility for a water quality report.
If you have hard water, clean your ice maker monthly instead of every three to six months. You may also want to install a water softener or a point-of-use filter on the line that feeds the ice maker. A softener removes minerals before they enter the machine, which dramatically reduces cleaning frequency and extends the machine's life. Some people use a combination: a water softener for the whole house and a dedicated filter on the ice maker line for extra protection.
When to call a professional
If you have run a cleaning cycle and the ice still tastes bad, smells musty, or the machine still will not make ice, the problem may be inside the compressor, the evaporator, or a sealed line that you cannot access. Call a repair technician at that point. Do not try to disassemble the machine yourself — you risk damaging refrigerant lines or electrical components.
If your ice maker is still under warranty, check whether cleaning voids the warranty before you use commercial cleaner. Some manufacturers require you to use only their branded cleaner or to have a technician perform cleaning. Your manual will state this clearly.
Frequently Asked Questions
Can I use vinegar to clean my ice maker?
No. Vinegar is acidic and can corrode metal parts and damage rubber seals inside the machine. It also leaves a vinegar taste in the ice. Use only commercial ice maker cleaner made for food contact surfaces.
What if my ice maker does not have a cleaning mode?
Older or very straightforward ice makers may not have an automatic cleaning cycle. In that case, turn off the machine, empty the water reservoir, fill it with commercial ice maker cleaner diluted according to the product instructions, and let it sit for 15 to 20 minutes. Then run water through the machine for several minutes to rinse. Consult your manual for the specific steps for your model.
How do I know if my water is hard?
You can buy a water hardness test strip at any hardware store for a few dollars. You can also contact your local water utility and ask for a water quality report, which is free. Hard water often leaves white mineral deposits on faucets and shower heads, which is another clue.
Will cleaning my ice maker void the warranty?
No, regular cleaning is part of normal maintenance and is expected by manufacturers. However, check your manual to see if the manufacturer requires you to use their specific cleaner or to have a technician perform the cleaning. Some warranties do have these restrictions.
How long does a cleaning cycle take?
Most cleaning cycles run 15 to 30 minutes, depending on the machine. The machine will beep or display a message when the cycle is complete. You should then run two to three rinse cycles with plain water before making ice again, which adds another 10 to 15 minutes.