Where's the "saddle valve" in my Model

Sounds like might be the Temperature Control Thermostat or some sensor in the circuitry telling the compressor and cooling parts to keep running because it thinks it isn't cold enough. There is probably a circulation fan to blow the cold air through the damper and it may not shut off either, conveying too much cold thermal conduction through ducting and all frig parts, regardless of damper being closed or open. With the temperature set on low, do the compressor and fans ever shut off once cold temperatures are attained? Freezer should be 0 or lower, frig 35-40.
check this video at RepairClinic.comhttp://www.youtube.com/watch?v=5vA8Ksv5kVY&feature=player_embedded

what is the model or refrigrator
????

I have seen this one other time in all my years of appliance repair and changing out the "water inlet valve" corrected the problem. I don't have an answer to why it did, but it did. Here is the valve for your unit.
After you change the valve be sure to purge the water line for a good 5 - 10 mins to get all the nasty water out. Keep me posted!

My canon ir3100cn displays "finisher can not be used" with on screen. i'm using saddle Q2 finisher. it doesn't move at all.

Is the saddle valve on the hot water line open? If so can you hear the water valve open? If it clicks that doesnt mean it is opening.

The sadle valve is located on the copper pipe where the tube attaches to your water pipe in the house. Shut the water off at the saddle valve. Remove the hose from the rear of the frig on the water inlet valve and put it into a pail. Tunr the water on at the saddle valve and see how fast the water comes out. Some times if the saddle valve is installed on the bottom of the copper pipe they will get corrosive and restrict water flow. Open and close the valve several times to make sure it is clear and reinstall the hose to the rear of the frig. Turn the water back on to see if it works.

The water valve or leaky tube.

For a little more info, copy and paste this link in your address bar:

http://books.google.com/books?id=tH6KC75vqSwC&pg=PA469&lpg=PA469&dq=icebin+has+water+leak&source=bl&ots=l1YRj8z01k&sig=Ign3vwxKWTxlqhcr9wUaXc09_A0&hl=en&ei=BHWVSvixFIngMailsPoH&sa=X&oi=book_result&ct=result&resnum=10#v=onepage&q=&f=false

In the water supply line to the refrigerator is normally a saddle type valve where the water supply is connected to your house water line. Trace it back and shut the valve off fully then turn it back on. When some work is done to any part of your household water system sediment may have lodged in the saddle valve causing a restriction. Closing the saddle valve and reopening it may dislodge the restriction.

1. listen for click of the switch when you try and get water,
2. make sure you have water to valve on back of refrigerator, turn off water and take line loose place in a bucket and turn water on, you should have a strong flow of water, it is common for people to have a self piercing saddle valve on the water line. these valves plug easily

YES ... MOST PROBLEMS WITH ICE MAKERS THAT SUDDENLY STOP WORKING IS THE WATER SOLENOID STRAINER IS CLOGGED OR THE ORFICE INSIDE IS CLOGGD.(USUALLY LOCATED BEHIND THE FRIG. WHERE THE SMALL WATER LINE CONNECTS). THE STRAINER AND ORFICE IS USUALLY ON THE "INLET" SIDE OF THE VALVE.WITH BUCKET AND RAG NEAR-BY, TRACE THE SMALL WATER LINE AND LOOSEN EACH NUT TO SEE IF YOU HAVE WATER. SOME WATER SUPPLIES USE A SMALL "SADDLE VALVE" FOR TAPPING INTO A WATER LINE. THEY CAN CLOG TOO ... YOU CAN TEST TO SEE IF THE SOLENOID VALVE HAS POWER TO IT ... BY TAKING A METAL BUTTER KNIFE OR NAIL FILE AND HOLDING IT CLOSE TO THE TOP OF THE SOLENOID (coil) YOU SHOULD FEEL THE MAGNETIC PULL IF IT IS ENERGIZED. IF IT IS ENERGIZED AND YOU HAVE WATER ALL THE WAY INTO THE BACK OF THE FRIG ... THE PROBLEM LIES SOMEWHERE ELSE.