How can I fix it if it stopped making ice?

The tray full may be triggered or stuck or another problem may exist. Look for what senses the ice being full and also check with Curtis support:
(another person was tld to do this and it workd:
1. turn machine on . 2. press the select button for 10 sec. then 3. press the power button for 10 sec. and then turn off the machine and unplug it for 6 hours.

I included some links for your convenience. Good Luck
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Troubleshooting Portable Ice Makers

Igloo ICE102 WHITE User Manual Troubleshooting Guide

Have a look at the side of the evaporator; there is a probe (thermistor) attached to it that tells the control board when to initiate the harvest cycle. make sure it's clean and attached properly and doesn't need replacing. If hitting the float switch initiates the harvest cycle it sounds like you have a blocked/ scaled water tube or switch housing. take off the bottom of the switch assembly (black rubber bit) and clean through to the water chamber. run a cycle of descaler before trying again.

You did not mention what Model and Make it is. That could change a fix.

Just a generic fix, assuming the unit its not too new, the first thing you want to do is turn the water off that is feeding your ice maker. Behind the refer on the wall. Be careful to not kink the water pipe pulling out and putting back the refer during your repair.

If stopping the leak into the refer was accomplished by turning off the water, now your confronted with how old is the refer and is it worth digging around and finding the actual leak. If the leak is in the wall of the refer (not the house wall), basically, just forget it, live with it and buy some ice trays. If you want the ice and it is really old, you may want to take this opportunity to replace the unit.

This would be my first assessment, not knowing age, make and model number. Sorry, wish I could be more helpful.

kindly,

Jim

it should be under warranty . is the water shut off to fridge . ice maker could be bad . make sure water to the ice maker is on just check your water line . a very easy common mistake and very easy fix if the water is not turned on to the ice maker it wont make ice . hope this helps let me know how it gos

if the filter is dirty enough to where it stops the flow of water then yes.a replacement of the filter should fix the problem for you

Make sure the plug in the water tray is secure and not allowing water to drip out. Check to make sure the float turns off the flow water once up to level.

Sounds like the water valve is stuck. Probably needs replacing. Turn off water after machine shuts down and see if water stops. If it does, water valve is most likely the issue.

Check the defrost timer. Rotate the dial on it to see if anything changes.

change filter and defrost water lines if frozen