Reasons and solutions for refrigerator not cooling Refrigerator non-refrigeration is a problem often encountered during the use of refrigerators. Refrigerator non-refrigeration always occurs suddenly. A large number of things that need to be refrigerated suddenly become unpredictable, which greatly affects daily life and wastes time to find. Repair master repair. There are many reasons for the refrigerator not cooling. Some of the simple problems can be solved by yourself. If you can fix it, you don’t need a master to repair it. What faults will cause the refrigerator to not cool, let’s take a look. Refrigerator non-refrigeration is a problem often encountered during the use of refrigerators. Refrigerator non-refrigeration always occurs suddenly. A large number of things that need to be refrigerated suddenly become unpredictable, which greatly affects daily life and wastes time to find. Repair master repair. There are many reasons for the refrigerator not cooling. Some of the simple problems can be solved by yourself. If you can fix it, you don’t need a master to repair it. What faults will cause the refrigerator to not cool, let’s take a look.
1. Working principle of refrigerator 1. Compression refrigerator: The mechanical energy is provided by the motor, and the compressor is used to work on the refrigeration system. The refrigeration system uses low-boiling-point refrigerants to absorb vaporization heat during evaporation. Its advantages are long life and easy to use. Currently 91 to 95% of refrigerators in the world belong to this category. 2. Absorption refrigerator: using heat source as power, the solution achieves the purpose of cooling in the continuous absorption-diffusion process. The disadvantage is low efficiency and slow cooling. 3. Semiconductor refrigerators: Refrigerators that use PN-type semiconductors with direct current to produce a Peltier effect on the junction to achieve refrigeration.
4. Chemical refrigerator: it is a refrigerator that uses certain chemicals to absorb heat strongly when dissolved in water to obtain a cooling effect. 5. Electromagnetic vibrating refrigerator: it is a refrigerator that uses an electromagnetic vibrating machine as the driving force to drive the compressor. The principle and structure are basically the same as the compression refrigerator. 6. Solar refrigerator: a refrigerator that uses solar energy as a cooling energy source. 2. Reasons and solutions for refrigerator not cooling Refrigerator does not refrigerate Reason 1: The temperature inside the refrigerator is too high, resulting in a leakage of fluorine in the refrigeration system, that is, the absence of refrigerant causes the refrigerator not to refrigerate. Solution: Find a repairman, re-weld the pipe, and evacuate and re-add the refrigerant. Reason two for refrigerator not cooling: frost in evaporator. The main reason is that the air-cooled refrigerator has only one evaporator. When the frost of the evaporator cannot be melted, the air duct is blocked, and the cooling capacity cannot be discharged, resulting in the refrigerator not cooling. Solution: Check the defrost system, it may be that the defrost timer is faulty, or the heating tube has been burned out. The reason why the refrigerator does not refrigerate is three: the refrigerator has been used for a long time, it can be a leak in the tube or the evaporator, and it is not useful to add fluorine.
Solution: It is difficult to repair, and it is necessary to find leaks for repair, but it will not take a long time. Refrigerator does not refrigerate. Reason four: There is a problem with the refrigerator compressor. If the pressure of the compressor return air pipe is too low, the compressor cannot start, which results in the refrigerator not cooling. Solution: Check whether the power plug of the refrigerator is plugged in, or the power supply is insufficient. Three, refrigerator common fault maintenance skills Causes of large noise and repair methods
(1) The refrigerator is not leveled, so that the compressor hangs in the metal shell, and the metal impact sound occurs during operation. Solution: It can be adjusted by adjusting the horizontal screw at the bottom of the refrigerator or adding a gasket at the low angle. (2) The screw that fixes the compressor casing is loose or incomplete, and the compressor shakes greatly when working. Solution: Fill and tighten the screws. (3) The water receiving tray at the bottom of the refrigerator is not installed tightly, and it shakes when the compressor starts or stops.
Solution: You can try to tighten the water tray or adjust its position. Reasons and repair methods of non-stop operation of compressor (1) The refrigerant leaks, the cooling capacity drops, the temperature inside the box cannot drop, and the thermostat controls the compressor to keep working. Solution: Send the refrigerator to the maintenance department as soon as possible to repair the leak and refill the refrigerant. 2) The condenser rack is filled with dust and oil, and the heat dissipation is poor. Solution: Use a soft brush to gently remove dust or use a dry soft cloth to wipe off the oil. (3) The contact of the thermostat switch is stuck, and the action fails, causing the circuit to be in a long-term connection state. Solution: If it is determined that the thermostat has failed, it should be promptly broken down for repair or replaced with a new thermostat. (4) The magnetic door seal is damaged, the cold air in the box overflows, and the external hot air escapes, causing the temperature in the box to not fall. Solution: Check whether the magnetic door seal is aging and malfunctioning, the suction is weakened, and there is no distortion, sagging, deformation or damage, and replace the door seal if necessary
