1. The power plug of the refrigerator is not firmly inserted. The capillary of refrigerator is blocked. 3. The refrigerant leaks or runs out. 4. Compressor failure. 5. The condenser bent is covered with dust and oil, which leads to poor heat dissipation. 6, thermostat switch contact adhesion, resulting in circuit failure, long time in the on state. Suggested solution: 1. First of all, check that the power plug of the refrigerator is not plugged in firmly. If it is loose and unplugged, it may not be powered on. Check whether the power supply voltage meets the requirements of the instruction scope. 2, take out the capillary, remove dirt and rinse. If the refrigerator is used for a long time, check it regularly. Try to run the refrigerator for 3 to 5 minutes, then turn off the power door and listen to the sound of water. There is no sound indicating that the refrigerant is exhausted or leaking. You should contact a professional as soon as possible to repair the leak in the refrigerator and replenish the refrigerant. 4. The compressor makes a slight motor vibration sound, indicating normal operation. If the high-pressure output pipe in the compressor is broken, or the screw fixing the pipe is loose and falls off, the high-pressure pipe will not exhaust, the low-pressure pipe will not inhale, and it can operate without refrigeration. Open the casing and replace it with a new buffer tube. If the screw is loose, tighten it. 5, condenser bend is full of dust and oil, you can use a soft brush to remove dust or wipe the oil with a dry soft cloth. 6. Dismantle the thermostat in time for maintenance or replacement. It should be noted that when dealing with electrical faults, attention should be paid to the safety of power failure.