What are the reasons for a car's air conditioning suddenly failing to start?
2 Answers
Car air conditioning failure to start is primarily a symptom of issues with the air conditioning system and the compressor. Below are detailed reasons and solutions for a car's air conditioning not starting: 1. Circuit system failure: Short circuits or breaks in the circuit directly lose the path for power transmission, preventing the electromagnetic clutch from properly regulating the compressor's working state. Solution: Use a multimeter to test the circuit section by section, locate the fault point, and repair it. 2. Lack of refrigerant: Refrigerant and refrigeration oil are mutually soluble, circulating back to the compressor through the system. If the Freon in the refrigerant is depleted, it will affect the refrigeration oil, leading to insufficient oil return, reducing the compressor's lubrication effect and causing it to jam or damage. Solution: Replenish the refrigerant. 3. Mechanical wear of the compressor: Long-term operation under high-speed rotation load may cause premature mechanical wear of the compressor components, rendering it inoperable. Solution: Inspect the compressor and replace worn parts. 4. Air conditioning not cleaned or maintained for a long time: Solution: Clean the air conditioning promptly.
Last time I encountered the sudden failure of the air conditioning, it was also during summer driving when it got unbearably hot, so I quickly checked it. Possible causes include a blown fuse—the fuse is located in the fuse box in the cabin, and you can replace it by finding the corresponding position for the air conditioning. Another issue could be a faulty compressor clutch; if the compressor isn't working, cold air won't come out. Or, it might be due to insufficient refrigerant—if there's a leak, a professional needs to refill it. Low battery voltage can also prevent the air conditioning from starting, especially in older vehicles. Oh, and a malfunctioning control module or switch could also be the culprit—it's recommended to first check if any warning lights are illuminated on the dashboard. When dealing with it, don't panic. Park the car in a cool place and contact a repair shop for inspection—safety issues shouldn't be taken lightly.
