1.Take cold water frequently or take too much cold water once
The cold water comes from cold water tank in which it is cooled. The tank is of limit volume, if you take cold water frequently or take much cold water once, the original cold water will reduce, new flowing water in the tank need 2-3 hours to cool, so the water is not cold enough.(If the ambient temperature is higher, it needs more time to cool the water)
2.The refrigerator was just powered on and fridge storage temperature was not reached to the desired temperature, or the fridge storage compartment is turned off.
Please turn on the fridge storage compartment, and wait for some time.
3.The water temperature is higher than fridge compartment.
When the cool water comes out from the tank, it should be through a long pipe to the dispenser, so it will a little higher than fridge compartment temperature. Normally, the water temperature is 10℃.
4.The fridge is not cool.
Please refer to the trouble shooting < Refrigerator not cooling for temperature sensor models>