There is no cooling effect when the air conditioner is on.

The reasons are as follows: 1. Refrigerant leaks. (Both the internal and external machines are working, and the compressor is also working, but it is not working). 2. The compressor capacitor is damaged or defective, resulting in the compressor not working. The phenomenon is similar to the above, except that 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 controller or air conditioner receiver is defective. Explain that the air conditioner is turned on and there is no response, or it has no effect. 5. Four-way valve (single cooler without this fault) or high and low side wind of compressor, air conditioning works but has no effect (the phenomenon is the same as the first one). 6. The failure of the internal or external air conditioner control panel causes the air conditioner to fail to cool (indicating that the air conditioner is unresponsive when turned on or has been tampered with). 7. The neutral line and live line of air conditioning power supply are connected reversely. A few air conditioners will have this kind of fault, usually during installation. 8. Internal or external fans are damaged (more capacitors are damaged), (external fans are damaged due to excessive exhaust temperature or high voltage protection). When the fan of the internal machine is broken, it means that the internal machine is frosted and the external machine has been working. The internal unit may cause water to enter the equipment.