How do I test my ice maker?

Testing whether an automatic residential refrigerator ice maker is working correctly involves performing a manual harvest test and verifying electrical and plumbing inputs. First, ensure the wire bail arm is lowered or the power switch is turned on. Second, force the ice maker into a test cycle by pressing and holding the diagnostic button on the front face of the unit for five seconds or bridging the metal test terminals inside the module head with an insulated jumper wire. Third, check that water is flowing into the fill tube. You can troubleshoot mechanical movement easily by watching the harvest rake. You can verify that your test is successful when the motor engages, the harvest prongs rotate through a full cycle, and the water inlet valve opens to replenish the mold tray with fresh water.