1.Maybe the thermostat is set on the high position. Operating constantly on high position will cause the low temperature in the fridge storage compartment and ice may be formed.
---.Set the thermostat on the suitable position.
2.Frost or ice bead formed sometimes on the back cabinet of the fridge storage compartment.
It is mainly because the air humidity in the fridge storage compartment is high, when the refrigerator is operating, the surface tempetature of the evaporator on the inner cabinet is very low and some moisture will condense.And when the refrigerator stops operating, the temperature will rise, and the ice bead or frost will melt into water and flow out from the discharge outlet. So it is a normal phenomenon. In summer,this phenomenon may becomes more apparent.
--- To reduce the scale of this phenomenon, please pay attention to the following:
(1)Try to reduce times of opening door.
(2)Make sure the door is closed tightly .
(3)Food should be stored with spaces in the fridge storage compartment. In particular, please do not place food near the back cabinet.
(4)Do not place food of high moisture in the fridge storage compartment. If you really need to do , you'd better wrap it with a piece of preservative film (e.g. silver foil)
3.The water discharge outlet is blocked.
---Check if the water discharge outlet is blocked . If so, dredge it with a piece of hole dredging pin or similar plastic bar.
4.Ice formed on the back wall.
---Call a service.