Fridge is about six years old, and new to us (came with the home purchase). There is plastic line on a self-piercing connector at the main water line. There is a filter inside the fridge and there was an additional filter on the water line for the fridge. When we first moved, the ice maker was doing okay making slightly hollow ice cubes, but the water faucet on the door was very low pressure. Didn't want to spend $30 for the filter cartridge inside the fridge, and previous owner had left a new cartridge for the second filter, so we changed the second filter. I think that same day I defrosted the fridge completely (might have def. sooner, don't recall). Sooooooooooo, now the icemaker has quit. We removed the filter on the water line and replaced the filter inside the fridge. Water flows better on the door, but not making ice....it seems to try to make ice but doesn't finish. Can't see into ice tray to see if it fills, so will probably defrost again and see what happens. Since the pressure of water flowing out of the faucet outside the door is better, seems the icemaker should be filling okay.
Does plastic line clog more easily than copper? Anyone still use copper (we installed our own copper line on a fridge years and years ago, and never had a problem). We have well, very nice soft water, but are completely stumped...moving the fridge out won't be easy, but doable.