Ice maker cycles. No water fills the ice cube tray. You can hear the motor hum to fill. At first I thought it was a frozen line. I even put a tiny little heater at the bottom front of the fridge, where the water line splits to go to water dispenser or ice maker. This actually seemed to work for a few weeks. But I ran stiff plastic tubing from the ice maker water fill, it when all the way through with no blockage. I have replace water filter. Replaced water inlet valve. Two initial questions (I'm sure there will be more): 1. Can too high water pressure prevent the ice maker from filling? I haven't measure (need to buy a gauge) but the water pressure coming from water dispenser is strong. It will splash out of a small cup on initial press. And 2. in pic, what is the disconnected green/yellow stripe wire, supposed to be connected to? Ice maker has been random, but now has completely stopped refilling. Any ideas?