What is the problem with the air conditioning not cooling in the Changan CS35?
4 Answers
The reasons why the air conditioning in the Changan CS35 is not cooling: 1. The condenser is too dirty, leading to poor heat dissipation. The condenser is prone to accumulating dust and small insects. If not cleaned for a long time, the heat dissipation of the condenser will be poor, and the cooling effect of the air conditioning will also significantly decrease. 2. The cooling fan is not working. The cooling fan not working also has a significant impact on the heat dissipation of the condenser. 3. The refrigerant pressure is too high or too low. The refrigerant, also known as Freon, is the cooling agent inside the air conditioning system. The refrigerant will naturally deplete over time in the air conditioning system. 4. Refrigerant leakage. Common leakage points include the air conditioning pipes and the evaporator, and related components need to be replaced. 5. The air conditioning belt is slipping. Belt slippage can cause abnormal operation of the air conditioning compressor and poor cooling effect. The air conditioning belt needs to be replaced or the belt tension adjusted. 6. Other component failures in the air conditioning system.
Yesterday, while driving my Changan CS35 on the highway, the air conditioning suddenly stopped cooling, which was particularly annoying. Common issues are usually limited to a few possibilities: First, insufficient refrigerant—this could be due to aging seals in the AC pipes leaking or simply not having been recharged for a long time. Second, a faulty AC compressor—if the pulley inside the compressor makes unusual noises or the clutch gap widens, it may slip and stop working. Additionally, a dirty or clogged condenser or a burnt-out fan relay can also affect cooling efficiency. Don’t be surprised if the blower suddenly stops, the filter gets completely blocked, or the evaporator freezes—faulty temperature switches or pipe leaks can trigger a chain reaction. When troubleshooting, start by checking the tension of the compressor belt, then inspect the high and low-pressure valve pressures. If the pressure is insufficient, look for leaks and recharge the refrigerant. Remember to regularly clean the condenser surface of leaves and insect debris to extend its lifespan.
A veteran mechanic with ten years of repair shop experience says that if the air conditioning in a Changan CS35 stops working, it's likely due to failures in a few key components. Refrigerant leaks are the most common issue, especially as the rubber O-rings in the piping begin to harden and crack after four or five years. For compressor problems, check if the pulley is spinning freely and listen for any slipping sounds when the clutch engages. If the condenser surface is clogged with willow catkins or dust, the high-pressure pipe will become scalding hot at highway speeds, and the fan relay is likely already blown. For electrical issues, inspect the relay fuse box, particularly the third row, number F12—a blue 15A fuse that often burns out. A stuck hot/cold switching valve can also prevent the compressor from starting, requiring removal of the glove compartment to adjust the motor linkage. Before repairs, it's recommended to use a high-powered flashlight to check for blockages in the radiator fins—this is the most cost-effective and efficient preliminary diagnostic method.
Recently, while helping a neighbor repair the CS35's air conditioning, I found that cooling issues mostly concentrate on three areas. Insufficient refrigerant causing the disappearance of the temperature difference between the high and low pressure pipes is the primary suspect, which can be predicted by observing the liquid flow state in the sight glass. When the compressor stops, listen for periodic clicking noises, a typical sign of electromagnetic clutch failure. For the electrical system, focus on checking the condenser fan relay; unplug the connector and use a multimeter to test the coil's power condition. If the cabin air filter hasn't been replaced for over two years, dust compaction can block airflow and affect evaporation efficiency. Unusual noises from the blower indicate worn carbon brushes, requiring replacement of the entire motor assembly. Electronic thermostat failures are the least likely but hardest to diagnose; using an OBD scanner to read vehicle fault codes is recommended to save time.
