If your ice maker is not working and your refrigerator is not making ice, start with the most likely causes and work down the list. The main control board is often the culprit because it controls the voltage to the ice maker; inspect the board for burned components and use a multimeter to check that voltage is reaching the ice maker. Next confirm freezer temperature; if the freezer is warmer than about 10°F the ice maker won’t cycle properly—set it between 0 and 5°F for reliable production. A faulty or under-pressured water inlet valve is another common problem; the valve needs roughly 20 psi and you should test it for power with a multimeter. If those checks pass, the entire ice maker assembly may be bad since many internal parts aren’t sold separately. Less likely but still possible are a bad dispenser solenoid stopping the ice door from opening or a frozen or damaged fill hose; thawing the tube or replacing the hose can fix fill problems. Enter your model number on RepairClinic.com to find the exact replacement part for your refrigerator.
01 - Gaggenau Refrigerator Main Control Board
The refrigerator's main control board controls the voltage being sent to the ice maker. If the control board is defective, the ice maker may not work at all. You can inspect the board for signs of damage or a shorted component. You can also use a multimeter to determine if voltage is reaching the ice maker after reviewing the refrigerator's wiring diagram.
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02 - Freezer Temperature is Above 10 Degrees F (-12C)
If the freezer temperature is above 10 degrees Fahrenheit (-12 Celsius), the ice maker will not produce ice cubes efficiently. The freezer temperature should be set between 0 and 5 degrees Fahrenheit (-18 to -15 Celsius) for the ice maker to work properly.
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03 - Gaggenau Refrigerator Water Inlet Valve
The water inlet valve is an electrically-controlled valve that opens to supply water to the dispenser and ice maker. If the water inlet valve is defective, or if it has insufficient pressure, it won’t allow water to flow through. As a result, the ice maker won’t make ice. The valve requires at least 20 psi to function properly. Make sure that the water pressure to the valve is at least 20 psi. If the water pressure is sufficient, use a multimeter to check for power to the water inlet valve. If the water inlet valve has sufficient pressure and is getting power, but the ice maker won’t fill with water to make ice, replace th...e water inlet valve.
One component of the ice maker assembly might be defective. Since many of the ice maker components are not sold separately, you may need to purchase and replace the entire ice maker assembly. Before replacing the ice maker assembly, check the water inlet valve, water line, and fan. If none of these parts are at fault, and the freezer temperature is at least 15 degrees Fahrenheit, replace the ice maker assembly.
The dispenser solenoid opens a door flap to release the ice and then closes the door flap once the dispenser finishes dispensing ice. If the dispenser solenoid is defective, the dispenser door won't open. To determine if the dispenser door solenoid is defective, use a multimeter to test it for continuity. In addition, check the dispenser actuator pin to ensure that it moves freely. If the dispenser door solenoid does not have continuity, or if the actuator pin does not move freely, replace the dispenser solenoid.
If there is low water pressure coming into the refrigerator, or the water inlet valve is defective, the ice maker's fill tube can become clogged with ice and prevent water from entering the ice maker tray. You can use a hair dryer to thaw out the frozen fill tube, but you should confirm the home has sufficient water pressure and the water inlet valve is functioning properly. If the fill tube appears damaged, you should replace it with a new fill tube.