Sub Zero Refrigerator Ice Dispenser Not Working – How to fix? by HoustonAuthorizedRepair.com
The part(s) or condition(s) listed below for the symptom Refrigerator not cooling are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
Most Frequent Causes for Refrigerator Ice Dispenser Not Working
| Cause 1 Dispenser Control Board |
The dispenser control board governs most of the functions of the dispenser system. If the control board is faulty, it may stop supplying power to the entire dispenser system. If only one dispenser part is not working, test each of the dispenser components before testing the control board. It is more likely that a single part has failed. If the entire dispenser system is not working, the control board is more likely to be at fault.
| Cause 2 Dispenser Switch |
The dispenser switches send voltage to the dispenser. If one of the dispenser switches is defective, the dispenser will not work. To determine if a dispenser switch is defective, use a multimeter to test each switch for continuity. If a dispenser switch does not have continuity, replace it.
| Cause 3 Dispenser Actuator |
The dispenser actuator interacts with the dispenser switches, which power the auger motor and other dispenser components. If the dispenser actuator is broken, it may not activate the switches properly or at all. Inspect the dispenser actuator—if it is broken, replace it.
| Cause 4 Auger Motor |
The auger motor spins the auger blade and pushes the ice through the dispenser chute. If the auger motor is burned out or defective, the ice won’t move forward and fall through the chute. To determine if the auger motor is defective, pull out the ice bucket and turn the bucket auger by hand. If the auger turns freely, use a multimeter to test the auger motor for continuity. If the auger motor does not have continuity, or if the motor is getting power but won’t run, replace the auger motor.
| Cause 5 Dispenser Solenoid |
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.
| Cause 6 Ice Bucket Auger |
When the dispenser lever is pressed, the auger motor rotates the auger. As the auger rotates, it pushes the ice toward the dispenser door and down the chute. If the auger is defective, it won’t be able to push the ice out of the dispenser. Check the auger to determine if it is broken or if it is disconnected from the auger motor. If the auger is broken, replace it.
| Cause 7 Dispenser Door Motor |
The dispenser door motor opens and closes the dispenser door to prevent cold air from escaping the freezer. If the dispenser door motor is defective, the dispenser door won’t open. As a result, the dispenser will not dispense ice. To determine if the motor is defective, first determine if the motor is getting power. If the motor is getting power, but it won’t run, replace it. You can use a multimeter to test the motor for continuity. If the dispenser door motor does not have continuity, replace it.
| Cause 8 Ice Crusher Blade |
If the ice crusher blades are jammed by ice, use warm water to melt the ice. If the ice crusher blades are bent or broken, replace them.