Not making ice

I have an Amana Refrig. Model BC120TL, freezer on the bottom about 12 years old. I have noticed a strange noise the last few days/ maybe a week now. I have narrowed it down to the ice maker. It was making a girggling sound. Lasted about 10 minutes, then would stop. Start again a few hours later. continued on. I putzed with the ice maker, emptied all the ice out to start with a clean ice tray. Waited a day and noticed it wasn't making ice. I putzed with the metal arm, up down, up down a few times and nothing. So I called for a service call. He is coming out on Monday. Got up this morning and now have ice and have noticed that the noise has not happened again. Don't seem right?? Thoughts?