Why is the Kia K4 air conditioning not cooling?

[McLeila]

Here are the possible reasons why the Kia K4 air conditioning is not cooling: 1. Reason one: The vehicle's air conditioning system is low on refrigerant. In this case, you need to go to a repair shop to check the system pressure with a pressure gauge. If it's low on refrigerant, it needs to be replenished promptly. 2. Reason two: The surfaces of the vehicle's condenser and radiator are too dirty, leading to poor heat dissipation. In this case, you need to go to a repair shop to clean the surfaces of the condenser and radiator. 3. Reason three: The vehicle's air filter is too dirty, resulting in low air speed. In this case, you need to replace the air filter with a new one. 4. Reason four: The quality of the refrigeration oil in the compressor of the refrigeration system has deteriorated, leading to reduced lubrication efficiency, which can cause damage to the air conditioning compressor. This directly affects the expansion valve and throttle valve, causing them to malfunction and resulting in the car's air conditioning not cooling.