Three things affet the operatio.
1: There is a valve. on my Fridge it's in the outside fridge compartment, (The Fridge access panel on the outisde)
2: The solenoid, is also located in that same compartment on the "Back" of the fridge
3: The swich on the ice maker..
With the ARM DOWN once the ice tray gets down to the trip temp (I think 25 degrees but it might be clolder) the unit starts. a timer motor runs and a heater element (U-Whaped hence the brand name U-Line) is fired up. The heater melts ice already in the tray just enough to let it slide out (NOTE this is the cresent type ice cubes There is another type)
WHen the "Fingers" on the shaft hit the ice, the timer motor stalls. till the heater melts the surface of the cubes (Contact surface) then it pushes the ice out of the tray Other fingerw not moving "Strip" the cubes off the moving fingers as it goes round but befor ethat happens a cam shaft closes a switch (NOTE another cam holds a switch closed during all this because the heater will re-open the thermostat) this adjustable switch s3nds power to the solenoid opening the water valve.
Possible issues
No water
Supply valve off
Solonoid failure (Rare)
swich failure (Rare)
Swicch adusted so far out it's not closing (possible but not common)
Ice block in water pate (Common)
Solutions
Open valves. and defrost covers most of the common issues.
