What are the reasons for a car's air conditioner not cooling and blowing hot air?
1 Answers
There are several reasons why a car's air conditioner may not cool and instead blow hot air: 1. Lack of refrigerant. Even if the air conditioning system is tightly sealed, refrigerant can still escape, especially if there are minor leaks in the air conditioning lines or condenser. Most refrigerant loss is due to leakage. 2. Damaged air conditioning flap. Damage to the air conditioning flap motor is relatively rare. 3. Dirty condenser. The main purpose of cleaning the radiator and condenser is to dissipate heat. If springtime poplar and willow catkins accumulate on the condenser, it can lead to issues such as excessive engine temperature or poor air conditioning performance. 4. Damaged air conditioning compressor, throttle valve, or expansion valve. The likelihood of the air conditioning compressor being damaged is low, so it's not a major concern. However, faults in the expansion valve or throttle valve can directly cause poor air conditioning performance. These issues are complex to diagnose and require professional repair shops. 5. Worn or loose belt. While checking all air conditioning components, the belt is often overlooked. Typically, during maintenance, a 4S shop will remind you to replace the belt. If not replaced, slipping may occur during use, leading to belt breakage, unusual noises, loss of power assistance, or poor air conditioning performance. 6. Moisture in the lines. The car's air conditioning refrigeration system includes a dryer tank designed to absorb moisture from the refrigerant and prevent excessive moisture from reducing cooling efficiency.
