Frigidare Ice Maker Not Making Ice?

My ice maker hasn't worked in a month. I have put hot boiling pots in to defrost it as that's what my repairman told me to do once when it was whining and groaning. He thought line was frozen. If it was frozen this didn't help the icemaker to start up again. We have water in the dispenser in the door, but no water is running in to the ice tray.

I just turned off the water and took off the dispensing valve out of the fridge to try and see if the line is clear going up to the freezer. I don't know how to take off the green waterline going up to freezer because it's the new self setting type. I have also changed the filter about two weeks ago before I started any of this. Can anyone tell me what to do?