The air conditioner doesn't cool, but what about the cold air blown by the outside machine?

1. Refrigerant leakage. The performance is that both the internal and external machines are working, and the compressor is working, but it is not working. ?

2. The compressor capacitor is damaged or bad, which leads to the compressor not working (the phenomenon is similar to the above, but the compressor does not turn and is overheated). ?

3. The resistance value of the temperature sensor changes at room temperature, causing the outdoor unit of the air conditioner to fail to operate (the phenomenon is the same as stopping the air conditioner after reaching the set temperature). ?

4. The remote control is broken or the air conditioner receiver is broken (showing that the air conditioner is turned on and doesn't respond, or it doesn't work when it works). ?

5. The four-way valve (the single cooler has no such fault) or the compressor leaks gas at high and low pressure, and the air conditioner works but has no effect (the phenomenon is the same as the first one).

The compressor compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous state and sends it to the condenser for cooling. After cooling, it becomes a medium-temperature and high-pressure liquid refrigerant, which enters the drying bottle for filtration and dehumidification. The medium-temperature liquid refrigerant is throttled and depressurized by an expansion valve (throttling element) to become a low-temperature and low-pressure gas-liquid mixture (with a lot of liquid), which is vaporized by absorbing heat in the air through an evaporator, and then returns to the compressor to continue compression and refrigeration. When heating, there is a four-way valve to make the flow direction of freon in condenser and evaporator opposite to that in refrigeration, so when heating, cold air is blown outdoors and hot air is blown indoors.

Generally, the service life of large household appliances is about 15 years. Although it is reported that some brands of air conditioners can still work normally after 20 years of use, this is actually rare. There will be many faults when the air conditioner is used over age, and even if it is repaired, it will continue to have problems.