What are the reasons for the air conditioning not cooling in Changan cars?

[Don]

Changan car air conditioning may not cool due to the compressor protection device tripping, which indicates system high pressure or overheating/overcurrent. Below are the reasons for excessively high pressure/overheating and troubleshooting methods: 1. Excessive refrigerant: Too much refrigerant, appropriately reduce the refrigerant amount. 2. Heat dissipation failure: Poor heat dissipation, check if the condenser tube has dust/dirt, clean the condenser. 3. Pipeline failure: Blocked pipeline system, refer to the pressure gauge for judgment, eliminate and reprocess the system. 4. Fluoride deficiency: Lack of fluoride, without fluoride the compressor exhaust temperature will overheat, causing the overload protection switch to trip.