If the foods in your HAIER HDW3618DNPB are freezing while the thermostat shows 5 °C, it generally indicates that the actual temperature is lower than the displayed setting, or that the cold air is poorly distributed within the appliance. Although 5 °C is close to the recommended temperature (4 °C in normal mode), several factors can explain this freezing issue.
Start by checking and adjusting the temperature. For a HAIER refrigerator, the optimal range is between 3 °C and 5 °C. If you are in Eco mode (which automatically sets to 5 °C), try switching to 4 °C or 5 °C in manual mode. In summer, with a high ambient temperature, you can increase it to 6-8 °C. In winter, a setting of 3-4 °C is sufficient. Adjust gradually and wait 24 hours for the temperature to stabilize before fully loading the refrigerator.
Next, check the cold air circulation. The HDW3618DNPB model operates with a static cooling system, which distributes cold air unevenly. To optimize it, ensure that you do not block the cold air outlets (usually at the top or on the walls of the refrigerator), do not overfill the appliance, and leave enough space between foods to allow for air circulation. Also, avoid placing foods directly against the side or back walls, especially sensitive products (soft cheeses, creams, delicate vegetables), which freeze more quickly in the coldest spots.
For a static cooling system like yours, regular cleaning and defrosting are essential. Ice buildup on the walls and air outlets reduces cooling efficiency and creates overly cold zones. The manual recommends regular manual defrosting (at least once or twice a month depending on humidity). To defrost: turn off the appliance, open the door, and let the ice melt naturally. You can place absorbent towels on the floor to catch the water.
Then inspect the door seals. Worn or improperly positioned seals allow warm air to enter, forcing the refrigerator to compensate by cooling more, creating areas of over-freezing. Check that the seals adhere well along their entire length by closing the door on a sheet of paper: if the sheet slides easily, the seal needs to be cleaned or replaced.
If the problem persists after these checks (temperature increase, frost cleaning, seal inspection), contact an authorized Haier technician. Your refrigerator comes with a 2-year warranty, and a defective thermostat, improperly calibrated temperature sensor, or faulty fan (if present) require professional intervention for diagnosis and repair.