Most ice makers don't have a reset. If your icemaker has stopped making ice, here are some things you can check.
Check the temperature of the freezer. If the temperature is above 12 degrees the icemaker won't go through a harvest cycle.
Feel inside the ice molds of the icemaker for water or ice. If the mold is empty the fill tube to your icemaker might be frozen up. Inspect the end of the fill tube using a flashlight. If it is frozen you can defrost it with a hair dryer.
If the mold is full of ice either the thermostat or the motor is bad in the icemaker. It is better to replace the icemaker than to replace either part. The cost is only slightly more for a new icemaker and replacing these parts is a chore.
If the mold is empty and the fill tube is not frozen you need to disconnect the power to the refrigerator and check the solenoid on the water valve and be sure you have water to the water valve. Check the solenoid with an ohm meter. You should read 12-50 ohms across the solenoid terminals.