What is the fault when the car air conditioner has no power?
2 Answers
Faults that cause the car air conditioner to have no power are as follows: 1. Compressor wear: Severe internal wear of the compressor leads to its inability to function properly. The compressor plays a crucial role in the air conditioning system, primarily compressing and delivering refrigerant, which causes it to operate at high speeds for extended periods, resulting in malfunction. 2. Lack of refrigerant in the car air conditioner: The compressor is used to compress and deliver refrigerant. If the refrigerant leaks, there is no refrigerant to compress or deliver, causing the compressor to fail. 3. Electrical system failure: Electrical system failures are a very common reason for the car air conditioner compressor not working properly. You can check if the circuit is unobstructed and inspect the temperature sensor and solenoid valve.
Last time the AC panel went black, I directly opened the glove compartment to check the fuse box, and sure enough, the 15A mini fuse was burnt black. I casually replaced it with a spare fuse and fixed the issue. Later, I found out it was caused by a chain reaction from a short circuit in the car charger. Malfunctioning AC buttons might also be due to desoldered control panel circuits—my old car had a loose panel connector, and surprisingly, tightening it with a toothpick did the trick. However, if the blower runs but no air comes out, it's most likely a burnt resistor module, which requires dismantling the center console to repair. The most troublesome issue is when the BCM control module fails, causing the entire AC system to collapse, leaving no choice but to visit the dealership for computer diagnostics to read the fault codes.
