Shut water off did not shut off ice maker- now ice
Assuming the water has been turned back on for a while, and your sure it's getting to the valve on the rear, follow this guide.
It should cover your problem. The freezer must be cold enough. 10 degrees or colder.
First step is to take a small paper cup of water and fill the cavity until it is near full. With the ice maker turned on, close freezer door and wait 3 hours to see if it harvests. If not, the ice maker is bad, and must be replaced. If the cubes harvest then.......
1. The water supply from the house is not delivering water to the water valve. Shut off the house at the meter, disconnect the line going to the water valve, and with the line pointed into a bucket, have someone turn the valve back on for a 15 second count. The water should come out smartly. If not, the line and it's fittings will have to be replaced.
2. The fill tube from the back of the machine that feeds water into the back of the ice maker is frozen up. You will have to remove the ice maker to visually inspect that tube. If blocked, it needs to be defrosted, but use caution. Too much heat too fast will start to melt plastic and vinyl parts you don't want melted.
If this is the case, then once cleaned out, you will have to change the water valve located in the back bottom rear of the machine because it is leaking during the off cycle.
3. If everything checks O.K. up to this point, you will have to purchase and install a new water valve, and install it.
P.S. Under very rare occasions the electric circuity in the ice maker will fail to send a signal to the water valve. Although rare, it can happen, in which case the best option is to replace the ice maker and water valve.