Either the temperature of the refrigerator is too low, or there is something wrong with the thermostat, which causes the compressor to work without stopping for a long time, so the back wall of the refrigerator will be covered with thick frost. If the freezing room temperature is too low, turn it up a little, usually between 4-8 degrees. The mechanical thermostat should be lowered. It's summer now, so it can be adjusted to 1-2. If there is no problem with the above methods, but the compressor still works without stopping for a long time, it means that there is something wrong with the thermostat and it should be repaired or replaced.

Troubleshooting of mechanical refrigerator thermostat

If there is a problem with the thermostat of the mechanical refrigerator, the compressor will keep working, the refrigerator will freeze, and the power consumption of the refrigerator will increase greatly, so it should be repaired and eliminated in time. The main reasons for the failure are as follows:

1. The temperature sensing head of the temperature sensing tube led out from the thermostat is loose and displaced. The temperature sensor should be restored to its original position and fixed so that it can be in close contact with the evaporator at the back wall of the refrigerator.

2. The internal contact of the thermostat is stuck. You can cut off the power first, and then set the gear knob of the thermostat to the highest gear. If it is rotated several times repeatedly, the contacts can generally be separated, then the thermostat is set to 1, and the power supply is turned on for debugging after 5 minutes of power failure. If the compressor can start and stop normally, the problem is solved, otherwise the thermostat should be replaced.

3. The mechanical conduction part of the thermostat has changed physically. The fine-tuning screw needs to be adjusted, but it should be operated by professionals. The two small screws of the thermostat are the temperature range adjusting screw and the temperature difference adjusting screw. Inside is the temperature range adjusting screw and outside is the temperature difference adjusting screw. If there is temperature drift, adjust the screw inside and adjust it clockwise to increase the main spring force. When the temperature is high, the refrigerator stops running. Counter-clockwise adjustment will produce the opposite result. If the starting and closing time, then it is necessary to adjust this screw (temperature difference adjusting screw). Clockwise contact spacing is small, and the start-stop time is short; The counterclockwise contact spacing is large, and the start-stop time is long. But in general, don't mess around.

4. The temperature sensing tube of the thermostat is damaged and leaks. Should be replaced with a new thermostat, the general electronic market refrigeration components shop around 25 yuan. You can also buy an external refrigerator companion (compressor start-stop time controller) for emergency temporary use, but the compressor start-stop time ratio should be set reasonably according to the seasonal temperature, that is, the compressor start-stop time ratio in summer is generally between1:1-kloc-0/:2; Spring and autumn are around 1: 3; In winter, the temperature is between 1:5- 1: 10, the freezer temperature is about-18 degrees, and the freezer temperature is between 0- 10 degrees, preferably between 4-8 degrees. The price is generally around 10 yuan. If the temperature compensation circuit of the refrigerator fails in winter, and the compressor of the refrigerator can't start working normally in winter, you can also use the refrigerator companion for emergency use. When the ambient temperature is higher than 15 degrees, the compressor can start to work normally, and then use the thermostat in the refrigerator.