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Sub Zero Refrigerator Ice Maker Not Working

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The 7 most common part(s) or condition(s) which cause the symptom Refrigerator ice maker not working are listed below starting with the most likely. Check or test each item and watch any available videos.

Other Causes and Conditions

Freezer Temperature is Above 10 Degrees F (-12C)

If the ice maker is not working check the temperature of the freezer. If the freezer temperature is above 10 degrees F. (-12C) the ice maker will not work properly. It functions best when the freezer temperature is set between 0 and five degrees F. (-18 to -15C). If the freezer temp is too high make sure the condenser coil is clean and the condenser fan is working to cool the condenser and compressor. Check the evaporator coil for frost. If too much frost is built up the air can't circulate thru the coil and you will need to check the defrost components for a failure.

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Water Inlet Valve - Part # 753858 Mfg Part # 4201440

Water Inlet Valve

RepairClinic Item # 753858

If the refrigerator ice maker is not working the water inlet valve might be defective. The water inlet valve is an electro-mechanical valve. The coil can show good for continuity and still not let the water thru.

 

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Water Inlet Valve - Part # 753859 Mfg Part # 4201450

Water Inlet Valve

RepairClinic Item # 753859

If the refrigerator ice maker is not working the water inlet valve might be defective. The water inlet valve is an electro-mechanical valve. The coil can show good for continuity and still not let the water thru.

 

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Ice Maker Assembly - Part # 818945 Mfg Part # 4200520

Ice Maker Assembly

RepairClinic Item # 818945

If the ice maker is not working it could be that the ice maker assembly itself is defective. The freezer temp should be between 0-5 degrees for the ice maker to cycle properly. There are several components in the control module of the ice maker that can fail and most are not sold separately. Also, ice makers have a relatively short lifespan and so it might not be worth fixing. If other, simpler parts like the water inlet valve or shut off arm have been ruled out, and the only thing left is the ice maker itself, replace it as a unit.

 

Other Causes and Conditions

Low Water Pressure from House Supply

If the ice maker is not working the water pressure in the house might be too low. The water inlet valve which supplies water to the ice maker is designed to work with a minimum of 20 psi of water pressure.

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Door Switch - Part # 1557694 Mfg Part # 7014646

Door Switch

RepairClinic Item # 1557694

If the refrigerator ice maker is not working, the door switch might be defective. When the freezer door is opened the freezer door switch does two things, it turns on the light in the freezer and turns off the ice maker and dispenser. If the door switch fails the dispenser will not turn on. The switch can be checked for continuity with an Ohm meter. If it doesn’t have continuity it should be replaced.

 

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Icemaker Switch - Part # 817296 Mfg Part # 3060170

Icemaker Switch

RepairClinic Item # 817296

If the refrigerator ice maker is not working, check the icemaker switch. This switch frequently gets turned off by accident. If the switch is turned on but the ice maker still doesn't work, check the switch for continuity with an Ohm meter. Replace as needed.

 

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