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How Do Ice Makers Work?
July 8, 2024
-
By
Ethan Clarke
Ice makers are great for anyone who enjoys ice cold drinks, or use a lot of ice on a regular basis. If anything, they’re a lot more convenient that using an ice tray.
But have you ever wondered how these machines work? How they’re able to transform water into ice?
Because that’s exactly what we’ll be discussing in this post. Keep reading to learn more!
How the Ice-Making Cycle Works
The ice-making cycle involves a few key steps, which we will be going over in detail below.
The Water Filling Process
The first step is to fill the ice mold with water.
During this step, the water valve is opened; this releases the exact amount of water needed to fill the ice molds.
It’s important to note that the valve needs to be able to withstand the incoming water pressure to function correctly.
Any issues such as leaks or improper opening can lead to overfilling or jamming of the ice maker.
Freezing and Forming Ice Cubes
Once the mold is filled with water, the freezing process begins.
The ice mold, often made from plastic or aluminum, shapes the water into ice cubes, and over time, the water gradually freezes, forming solid ice.
Heating and Releasing Ice Cubes
Once the ice cubes are frozen solid, it’s time to set them free.
This is possible thanks to the heating coil located beneath the ice maker; its job is to warm the bottom of the ice mold, which helps loosen the ice cubes, allowing for easy removal.
Key Components of a Refrigerator Ice Maker
A refrigerator ice maker consists of various parts, all of which work together to make ice. These components consist of a:
- Water valve
- Thermistor
- Ice mold
- Motor
- Heating coil
- Shut-off arm
- Collection bin
Water Valve
The water valve controls the flow of water into the ice mold.
When it comes time to make ice, an electric switch activates the valve, which opens for 5-7 seconds to dispense the precise volume of water needed.
Ice Mold
The ice mold is where the magic happens. It’s where water transforms into the ice cubes that you use for your beverages.
Thermistor
The thermistor is a temperature monitor that keeps check on the water temperature and sends a signal once the ice is ready.
How does it work? It changes its electrical resistance with temperature changes.
When the water reaches the perfect ice-forming temperature, the thermistor slips a switch, signaling that it’s time to move to the next step in the cycle.
Heating Coil
The heating element is responsible for freeing the ice from the mold.
When activated, it triggers a change in the refrigerant path, heating the evaporator pipes and the metal ice tray, which helps loosen the ice.
Motor
The motor is the driving force that pushes the ice cubes from the mold into the collection bin.
It turns a gear that turns a second gear attached to a plastic shaft with ejector teeth that collect and pushes the ice cubes from the mold.
Collection Bin
The ice bin is designed to hold and store your ice cubes before they are dispensed and used.
Most also come with a dispensing mechanism that allows for convenient access when you need a cube or two to keep your food cold.
As long as the motor is working properly, you should not have an empty ice bin.
Shut-Off Arm
The shut-off arm regulates ice production and activates the water valve when it reaches the bottom, triggering another ice-making cycle.
Setting Up and Using Your Refrigerator Ice Maker
Here’s how to set up your refrigerator ice maker.
Step 1: Prepare the Fridge
Start by unplugging the refrigerator and taking out the access plugs and covers.
Then, expose the water inlet opening by cutting an ‘X’ through the sticker on the back of the refrigerator and removing the foam insulating plug.
Step 2: Connect the Parts
Install the ice maker wiring and connect it to the ice maker’s harness, then secure it with the cover plate.
Next, attach the L-shaped leveling bracket to ensure the ice maker is level.
Step 3: Connect the Water Tube
Insert the water fill tube into the freezer compartment. Lock it in place and insulate it with a foam tube.
Next, connect the water supply tube to the cold water supply pipe and water inlet fitting on the refrigerator’s fill valve.
From there, turn on the water supply and plug in the refrigerator.
Supply:
- Scissors
- Screwdriver
Troubleshooting Common Ice Maker Issues
Even the most reliable ice makers can experience issues from time to time. Some common problems you may encounter when making ice include: a paused or turned-off ice maker, a blocked dispenser, a temperature setting that’s too low, dirty water filters, or clogged water inlet valves.
Steps to Take If Your Ice Maker Isn’t Making Ice
If your ice maker is not producing ice, don’t panic. It could be a simple issue that you can fix yourself, just follow these steps:
Supplies:
- Flashlight (optional)
Step 1:
Check the chute for ice cubes and clear away any obstructions
Step 2:
Check to see if the water supply line is frozen. Use a flashlight, if necessary.
Then examine the fill tube for ice blockages.
You can also try resetting the ice maker by turning it off for a minute, then turning it back on.
Cleaning the Ice Machine Filter
Over time, minerals and debris can build up inside the filter, preventing water from passing through. That’s why it’s so important to clean it regularly.
Supplies:
- Water
- Dish soap
- Clean cloth
Step 1:
Take the filter out of the ice maker and set it aside.
Fill a sink with warm water and mix in some mild soap to create a cleaning solution.
Step 2:
Submerge the ice machine filter in the mixture for 10-15 minutes to remove any residue or buildup.
Step 3:
Rinse the filter thoroughly with water afterwards, then re-insert it into the ice maker.
Filers should be replaced once every 6 to 9 months, depending on usage.
Cleaning the Ice Maker
The ice maker itself also needs to be cleaned regularly to keep it in tip top condition.
Supplies:
- ACTIVE Ice Machine Cleaner
- Damp cloth
Step 1:
Turn off the ice machine and remove all the ice.
Step 2:
Drain the water pan or let the ice melt off the evaporator grid. Then add 2-4 oz. of ACTIVE Ice Machine Cleaner to the water pan.
Step 3:
Run two cleaning cycles, then wipe the interior surfaces with a damp cloth to remove any leftover water or debris.
Alternatives to Built-In Refrigerator Ice Makers
Built-in refrigerator ice makers may be convenient, but they’re not the only available option.
For example, you can also use traditional ice cube trays, undercounter ice makers, and countertop ice makers.
Countertop ice makers, for example, are great in that they’re portable and allow for ice-making without the need for an entire refrigeration system.
Energy Efficiency and Environmental Impact
Ice makers, like any other appliance, consume energy, meaning their use has an impact on the environment.
For example, the refrigerants used in ice machines can contribute to ozone depletion and global warming.
Given that, it’s not surprising to know that the U.S. Department of Energy has set energy efficiency standards for these types of machines.
Understanding Ice Makers
From the water-filling process to the ejection of ice cubes, every step is crucial.
Understanding the key components of the ice maker and how they work will not only satisfy your curiosity but will also help you maintain and troubleshoot your appliance effectively.
Key Takeaways
- The ice-making process includes filling ice molds with water, freezing them into cubes, then heating the molds to release the ice into an ice bin
- The major components of an ice maker include the water valve, ice mold, thermistor, heating coil, and motor
- There are different types of ice makers to choose from including refrigerator ice makers, undercounter ice makers, freestanding ice makers, countertop ice makers, and commercial ice makers
Frequently Asked Questions
How do ice makers know when to stop?
Most ice makers come with an optical sensor or a mechanical arm that detects when the ice has piled high enough.
How do ice makers work?
A refrigerator ice maker works by filling a mold with water and freezing the water.
The heating coil underneath the mold then heats the ice, which allows it to be dispensed into the storage bin.
Why is my ice machine producing cloudy ice?
Ice will appear cloudy if it contains minerals (e.g. scale build-up) or if there are trapped air bubbles.
To fix the issue, try cleaning your ice maker with ACTIVE Ice Machine Cleaner.
What are some alternatives to built-in refrigerator ice makers?
You can use traditional ice cube trays, undercounter ice makers, or countertop ice makers. Just make sure they fit your specific needs and circumstances.
How long will it take a new refrigerator ice maker to make ice?
Once you’ve installed your ice maker, it will take between six to twelve hours for it to produce ice.
How can I tell if my ice maker is clogged?
If your ice maker is producing ice cubes that are smaller than normal, there may be a clog (e.g. frozen water) in the supply line. Depending on the size of the clog, the machine may also stop working altogether.
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Ethan Clarke
Ethan Clarke is a seasoned expert in appliances and household waste systems. Referencing his extensive experience as an appliance repairman, Ethan shares his invaluable knowledge through detailed maintenance & troubleshooting manuals. Ethan’s insights help homeowners understand and maintain their appliances efficiently, ensuring longevity and optimal performance. He’s here to provide practical, easy-to-follow advice for all your appliance needs.
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