I have a manitowoc commercial ice machine.It has stoped making Ice and just seems to keep running water and not freezing

90% of ice maker problems are water related. Sounds like water may be continually seeping in from the inlet water valve (normal thing to do if the water level is low). This will not allow the water to get down to freezing temperature. You have to identify the reason that water is constantly running in. It's probably "leaking" out at the dump valve. Or does that unit have a float valve that may be leaking. Check your drain to see if water is leaking out during the freeze cycle.

if water valve still allows water even after unplugged electric wires to it then water cylinoid valve is bad.. if water stopes when unplugged then relay in circuit board is sticking or board defective..

Ice thickness probe on Manitowoc and float switch may be dirty or stuck if hoshi. Manitowoc sometime the thickness probe can get dirty and a film of algae and not sense ice properly but rare

Make sure the plug in the water tray is secure and not allowing water to drip out. Check to make sure the float turns off the flow water once up to level.

several things cause freeze ups.
If you have water filters on the water system, be sure they are not restricting the water flow. water flow pressure should not go below 20 psi.
The bin stat may not be shutting off the unit properly. It should shut off machine within 10 seconds of ice making contact.
Make sure the float switch is not dirty. Be careful when cleaning. Fragile
Make sure water pump runs the entire time it is in the freeze cycle.
Be sure the evaps are clean. Ice cubes will hang on if not clean.
Water solenoid has a screen where the water line screws on to it. Turn off water and check screen to be sure it is clean. This can restrict water flow.
Make sure water valve closes all the way. Turn machine off and see if water is still running. Valve may be leaking water thru.
Dip switches on the board, #1 and #2. Turn them both on and it will change the defrost time to 3 minutes. If both are off, they are set on 1 minute.

Hope this solves your problem. Let me know

The bin control shuts it off when the ice bin is full. Without a bin control it should keep making ice and never stop.

seems that its low on water or float switch is bad. try to clean float

i suspect a defective liquid line or pump down seleonid coil. just make sure you hear the "click" when it starts up if not the selenoid coils could be defective. also verify that the condenser fan is running,because if not you are short-cycling on high head pressure. please contact if you need any additional info

Update on the above! The water does shut off, but when the water is running it runs and splashes for awhile down all over the ice thats in there. Water bill is very high when it is in use.