This is a problem you can fix yourself, every couple of weeks or so you should drain water from the cooler this can be done by removing the (usually it is red) cap from the overflow, which can be found under the pipe connections on the front of the cooler.
What has now happened is the water level has reached the point where it is running over the top of the tank.
If you take the cap off however and no water comes out. This means that ice has formed on the other side of the overflow, to remedy this; the cooler should be switched of whilst in use, until water does flow.
Then the cooler can then again be switched back on. Coolers should be drained or topped up regularly otherwise an ice bank will not form properly.
I filled the water cooler up and it ran straight out from underneath
Then the cooler is overfull .Have you taken the red cap out of the overflow if you have then as stated above ice has formed on the other side of the overflow, to remedy this; the cooler should be switched off whilst in use, until water does flow out of the overflow. Then you can switch the cooler back on and replace the red cap, every couple of weeks or so you should drain water from the cooler this way.
Not sure how to leave a question but there is a running water sound coming from my under counter cooler for carling what could this be?
The water sound is normal it is the recirculating water pump, pumping chilled water up to the tap.
To add to that just make sure the cooler is topped up to the correct level.
what is the correct level for the water in the beer cooler, should you be able to see it or feel it through the inspection hole. thanks
Remove the plug to see if any water comes out, the overflow is by the beer inlets and outlets. If not switch off cooler at the mains. Top up through the hole in the top till water comes out through the overflow. Now the icebank has the correct amount of water, replace the plug. Otherwise follow the instructions as above.