I have a sub zero 590 refrigerator. The ice maker stopped working. I replaced the control module and still not working. Then I replaced the whole ice maker and it is still not working. After running a series of electrical tests on the new ice maker module I determined that I was not getting any power to the ice maker. But I am getting power to the plug itself. Turns out there are two corroded connectors on the flat plug that fits into the module. It looks like a huge job to replace the whole harness, it goes up into the top of the refrigerator and goes all different directions. Is there a way I can replace just the plastic plug on the end of the harness where it plugs into the module?

SOURCE: Kitchen Aid Ice maker Stopped working

I would suggest not buying a KitchenAid. I have the same problem with my ice maker. Have had nothing but problems with every KitchenAid product that I have ever owned. I will never purchase another KitchenAid product.

All of there appliances are second rate. That is "The KitchenAid Difference"

SOURCE: ice maker

verify the water supply to the valve first, second verify valve to icemaker works(unit has dual valve at rear bottom of fridge, switch plugs, then press water dispenser and see if icemaker fill with water ) if fills icemaker is bad , if not valve is bad. replace one or the other.

SOURCE: ICE MAKER SUB ZERO REFIGERATOR

Check water turned on. check ice button switch turned on in fridge. remove juice storage, ice container in freezer, check ice bucket full white plastic flapper to make sure not stuck on a white peg at top. flapper must hang down and be freely movable to signal ice maker to keep busy. If up high will turn off ice maker. Lots of other parts especially heater circuits involved also: fill tube supply heater not working then frozen supply line then no ice. Look for wiring diagram in ziplock behind compressor grille. can order parts at repairclinic.com. logical design, layout, easy to get to sensors, heaters. makes sense if look at it long enough.

SOURCE: Sub zero 532 ice maker

When my repair tech came out, he showed me that the fill tube sometimes retracts toward the rear of the freezer. He simply pulled it forward with a pair of needle nose pliers until it rested in the delivery reservoir. This placement allows the detector to know when the tray is full and shut off; thus not overfilling the freezing tray and/or splashing additional water onto the freezer wall and into the ice cube drawer.

SOURCE: How do I replace refrigerator

http://store.4appliancerepairparts.com/servlet/-strse-6795/16009-621038-751228-7516450/Detail

These switches snap into place. Carefully remove them by releasing one side so the panel is not damaged. The above URL will have a picture of a similar switch to the one in question.