Ice begins to build up when water drops freeze before they trickle down or evaporate, and it happens for the following reasons:
- Frequent opening of the door or deformed gasket. This results in excess warmth getting inside the fridge and more intense thawing with excess water freezing and ice building up.
- Putting hot food in the refrigerator. The result is the same as described above. As food cools down, it steams and emits heat into the freezing chamber, which impairs the work of the whole system.
- Freon leak. Lack of refrigerant results in shorter periods of thawing or no such periods at all. Freezing never stops, nor does the ice buildup process.
- Temperature sensor failure. Modern refrigerators use error codes to report malfunctions. For example, an LG fridge displays F3, F4 or F5 LG error codes to report temperature sensor problems. This is a technical issue, which should be solved by a trained technician only. Please, consult a professional and, if necessary, replace the faulty part.
If a problem occurs once every six months, this is not a problem. Again, a good and functional refrigerator must be fully defrosted at least once every 5 to 6 months, and one featuring a No Frost system can last up to two years. If ice builds up on the back wall too soon, consult a professional.