What are the reasons for the burnout of a car air conditioning compressor?
3 Answers
The reasons for the burnout of a car air conditioning compressor are: 1. Burnout of the motor coil; 2. Poor heat dissipation of the condenser; 3. Leakage of the exhaust valve; 4. Damage to the insulation layer of the stator winding and circuit break. The compressor is the heart of the car air conditioning refrigeration system, playing the role of compressing and transporting refrigerant vapor. According to different working principles, air conditioning compressors can be divided into fixed displacement compressors and variable displacement compressors. The functions of the air conditioning system are: 1. Achieving a cooling effect through the continuous transformation and circulation of refrigerant; 2. Using the engine coolant, waste heat, or heat generated by a burner as a heat source for heating, which is then heated by the heater and blown into the car by the blower to increase the temperature and achieve a heating effect; 3. Drawing in fresh air from outside the car for ventilation and air exchange to prevent the windshield from fogging up.
Compressor burnout is usually caused by insufficient lubrication or deteriorated oil quality, leading to excessive internal friction and overheating. I've seen many cars suffer from this due to prolonged oil changes or the use of low-grade oil. Additionally, insufficient refrigerant can overload the compressor, causing high pressure and temperature spikes that directly burn out coils or seals. Electrical issues like short circuits or voltage instability are also major culprits, especially in older cars with aging wiring. Poor driving habits, such as repeatedly turning the AC on and off in hot weather without giving the system a break, can also contribute to compressor failure. It's recommended to inspect the AC system every 20,000 kilometers, use genuine parts, and address any abnormal noises or poor cooling performance early to avoid major repairs.
Last time my car's air conditioning compressor broke down, the mechanic said it was mainly due to lack of maintenance—the oil dried up, causing friction, overheating, and ultimately burning out. Another factor was improper usage, like running the AC continuously for several hours in the summer without breaks, which overheated the compressor and led to its failure. Low-quality replacement parts were also to blame, as cheap components have a shorter lifespan and are prone to malfunctions. Now, I check it every six months, clean out dust, and replace the filter to avoid similar issues. I also choose reliable repair shops and avoid using off-brand parts just to save money. Remember, regular maintenance can save you a lot of money, extend the compressor's lifespan, and give you peace of mind.
