The ice maker on my GE Monogram ZISB42EMD stopped working suddenly. The motor on it still runs and I don't see any obvious problem with the water supply, but there must be somewhere! Thanks

Hello,
You can solve this yourself by taking the following steps.. Take off the back panel in the freezer. 1/4" screws. Use a nut driver or ratchet and socket with an extension. 2. Behind the frost is the evaporator and the defrost heaters. One heater in the middle and one at the bottom. They are glass tubes. If you can see the bottom heater that is great. If not use a hair dryer and defrost only the very bottom to expose the lower heater only. 3. Now in the refrigerator section at the top where the controls are, take off the long plastic piece to expose the timer. The timer should be on the right hand side and have a little circle that is slotted. Get a flat screwdriver and turn that timer slowly clockwise just until it clicks and the refrigerator turns off. This will put it into defrost. 4. Now look at that heater that you exposed and see if it glows and gets hot. If it does, then the timer is bad. 5. If the heater doesn't come on then go ahead and defrost the rest of the evaporator with the hair dryer. This will take a little while. Don't poke at the evaporator!!! 6. Once totally defrosted look at both heaters. They should look like clear glass and see a silver coil running thru them. If they look discolored at all then the heaters are bad. The heaters come as a complete assembly with the defrost thermostat which clips onto the evaporator. 7. If the heaters look ok the only way to know for sure if they are bad is to check continuity with a meter on the plug at the end of their wiring harness. If you can check that then you can splice in a new defrost thermostat to solve the problem. However the best thing to do is replace the heaters and defrost thermostat . It is easy to install. Follow these steps and this will solve your problem.