I’m trying to diagnose a problem with the ice dispenser on my KitchenAid KSCS25FTBL02 side-by-side fridge. The symptom is that when you press the ice switch, the chute door opens and the little ice cubes on the display animate, but the ice auger motor does not run. The ice maker makes ice and the water dispenser works. Testing it with the trim removed, I can hear a relay click at the times when the motor should be starting and stopping, but the motor does not do anything at all – no hum, no trying to move, no nothing. I’ve tried it with the ice bin removed, with the same results.
Removing the harness connector from the motor, I see five pins. (There are only four wires in the harness.) Ohming out the motor pins, across the rightmost two I get 125 ohms; all other combinations read open. I checked for voltage on the two corresponding pins of the harness. When the dispenser calls for ice, it applies +5V if cubed ice is selected, and -5V if crushed ice is selected (or vice versa; I forget which was which). So it looks like some voltage is getting to the motor.
Is this really just a 5V motor? Or are the other two wires in the harness maybe carrying 120V? If so, it doesn’t appear that it can be doing anything since the corresponding pins on the motor read open. This all leads me to think that the problem is with the motor. However, since it’s a rather expensive item, I’d like to know if there is something else I can check before I order a new motor.