How does a refrigerator ice maker know when to stop making ice?

Author: Reynold Becker  |  Last update: Tuesday, June 2, 2026

There are two methods for this: either an optical sensor or a mechanical arm, which detects when ice has piled high enough. If your ice maker won't stop making ice, it means ice is not piling high enough to reach the sensor or arm, typically because the ice bucket is not in the proper position.

How does an ice maker know when to make more ice?

Some refrigerators use an infrared beam to sense the level of ice in the ice bucket. When the ice level reaches the top of the bucket, it interrupts the infrared beam. The control board then shuts off the ice maker. When the ice level drops below the beam, the control board signals the ice maker to make more ice.

How does an ice maker know when to stop filling water?

There is some kind of lever (traditional switch ) - a pressure switch under the ice collection area. Once the amount of ice hits a certain weight, the production mechanism is deactivated.

Will my ice maker stop making ice if it's full?

No. There is a sensor in the ice maker. When the sensor detects that the bin is full it shuts off the water supply and makes no more ice. However, if you don't use any of the ice it will be affected by the repeated defrost cycle. The defrost gener...

How does an icemaker know when to stop making ice?

Some refrigerators use an infrared beam to sense the level of ice in the ice bucket. When the ice level reaches the top of the bucket, it interrupts the infrared beam. The control board then shuts off the ice maker. When the ice level drops below the beam, the control board signals the ice maker to make more ice.

Ice Maker Not Working? - Check these 6 Things first!

How does the ice maker know when the ice is frozen?

The refrigerator's cooling unit freezes the water into ice. The icemaker has a built-in thermistor that monitors the water temperature in the molds. When the temperature reaches a certain level, the thermistor closes a switch in the electrical circuit.

What tells the ice maker to cycle?

As the ice melts or is scooped out, the ice level drops away from the thermostatic bulb. When the bin control sensor measures the rise in temperature, it signals to the ice maker to start the freeze and harvest cycles again.

How do I get my ice maker to stop making ice?

To turn off the icemaker, find the on/off toggle switch or slide switch on the side or front of the icemaker and turn it off.

Is it bad to leave an ice maker on all the time?

Most ice makers can be left on all the time in order to ensure that you always have a fresh supply of ice. Like refrigerator ice makers, these appliances are typically designed to run constantly.

How often should ice maker dump ice?

In conclusion, the frequency at which a Frigidaire refrigerator's ice maker dumps a tray of ice cubes typically follows a timer-based cycle, with most models doing so every 1 to 2 hours. However, this can vary based on the specific refrigerator model, user settings, temperature, usage patterns, and ice maker design.

What tells the icemaker to fill with water?

First, the icemaker itself is what cycles and sends power to the valve once it cycles in order to fill the tray up with water. I see you replaced the valve already so disconnect the water line going to the icemaker from the valve and blow through it to make sure the water line isn't frozen up above the icemaker.

Which brand of refrigerator is the best?

Our Top Pick: LG produces excellent refrigerators that perform well in our tests and receive high satisfaction ratings from consumers, including our survey participants. The Smart French Door Refrigerator with Dual Ice Maker stands out for its simple, user-friendly design and customizable features.

Does the Frigidaire ice maker stop when full?

NOTE: Keep in mind the ice maker will also turn off automatically when the ice container/bin is full.

What tells the ice maker to make ice?

The cooling unit in the refrigerator does the actual work of freezing the water, not the icemaker itself (see How Refrigerators Work for details). The icemaker has a built-in thermostat, which monitors the temperature level of the water in the molds.

Do ice makers have timers?

In ice makers, a timer controls an electromechanical valve called the solenoid valve. The solenoid valve uses a magnetic field to generate and control the amount of water used to make the ice. The timer opens the valve to dispense water into a metal or plastic mold.

What is considered a batch of ice?

Each batch is about 3/4 of a tumbler glass of ice.

Do ice makers know when to stop making ice?

There are two methods for this: either an optical sensor or a mechanical arm, which detects when ice has piled high enough. If your ice maker won't stop making ice, it means ice is not piling high enough to reach the sensor or arm, typically because the ice bucket is not in the proper position.

What is the average life of an ice maker?

Sadly, with every piece of equipment comes a lifespan. With proper cleaning, a quality ice machine will last around 4 to 5 years on average, sometimes even longer. So how do you know when it's time to replace your ice machine? The first thing you need to do is locate the problem.

Do refrigerator ice makers use a lot of electricity?

Generally, ice machines that fall between 800-1200 lbs. of ice a day require a 20-amp, 220v outlet. Ice machines that produce over 1200 lbs. of ice a day typically require a 30-amp, 220v outlet.

Why does my refrigerator ice maker keep making ice?

Make sure the ice bin is directly below the ice maker. If the ice bin is not in the correct place, the shutoff arm will not work properly and the ice maker will continue to produce ice. If you have removed the shelf from the freezer there will be too much space between the ice maker and the ice bin.

How can I reset my ice maker?

Unplug the machine and wait 10 seconds. Plug the machine back in and press the ON button. You should see a blue light appear, letting you know that the machine has been reset.

Do ice makers automatically turn off?

NOTE: Your ice maker has an automatic shutoff. As ice is made, the ice cubes will fill the ice storage bin, and the ice cubes will raise the wire shutoff arm to the OFF (arm up) position. Do not force the wire to shut off the arm up or down.

How does an icemaker know when to dump ice?

When the ice reaches a certain thickness (depending on your ice type), the sensor detects a drop in freezer temperature and signals the ice maker to begin the dump cycle.

How often does a refrigerator ice maker cycle?

A really good refrigerator ice maker will produce 8 to 10 cubes every 90 minutes. In this case, your ice maker should cycle around 16 times each day yielding around 130 cubes in a 24 hour period.

What causes a long freeze cycle on an ice machine?

When the freeze cycle is started, the board starts the maximum freeze timer. If the contacts stick closed, this would cause a long freeze cycle. The float switch can be checked by using a simple ohm meter. If the float is in the up position, the switch is closed.

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