What is the reason why the Haval H6 cannot switch between hot and cold air?

[StSteven]

Haval H6 cannot switch between hot and cold air for the following reasons: Damage to the air conditioning compressor, throttle valve, or expansion valve: There is a saying in the air conditioning compressor circle: 'Low pressure high, high pressure low, replace the compressor.' The probability of damage to the air conditioning compressor is not high, but faults in the expansion valve and throttle valve directly lead to poor air conditioning cooling. Lack of refrigerant: Because the sealing device of the air conditioning system is not absolute, the refrigerant in the air conditioning system generally dissipates over time. Therefore, ordinary vehicles need to have refrigerant added every 2-3 years. Some vehicles may even require it once a year. If the car's air conditioning and cooling equipment are not functioning well, poor cooling will start to occur after adding refrigerant for a period of time. When this happens, the condenser may be leaking. The method to check for leaks is quite laborious. Generally, fluorescent dye is added, and a special glass is used to inspect, allowing the leak point to be identified.