What are the causes of car air conditioning cooling failure?
1 Answers
The causes of car air conditioning cooling failure include: clogged condenser fins, insufficient air conditioning compressor pressure, and clogged evaporator fins. Below are detailed explanations of the causes of air conditioning cooling failure: Clogged condenser fins causing excessive system pressure: The air conditioning system operates under pressure because the compressor components are pressurizing. When too much refrigerant is added or there is a blockage in the pipeline, it can lead to excessive system pressure. In such cases, the control system will disconnect the compressor's electromagnetic clutch to shut down the compressor, preventing further pressure increases that could damage the system. At this point, the compressor does not operate smoothly, and the air conditioning will not cool. The solution is simple: measure the system pressure, confirm if it exceeds the standard, and then release some refrigerant to restore normal pressure. Insufficient air conditioning compressor pressure: The compressor is the core component of the air conditioning system. Abnormal refrigerant pressure, circuit faults, damaged temperature sensors, or loose belts can all cause compressor malfunctions, leading to insufficient compressor pressure and affecting cooling performance. Clogged evaporator fins: If the evaporator is too dirty, it reduces air flow and heat exchange efficiency. The air may not be cool at high fan speeds but normal at low speeds. The condenser is located at the front of the car, placed alongside the cooling system radiator, and is about half the size of the radiator. Some cars have two fans at the front, one for the car's cooling system and the other for the condenser. If the condenser is too dirty, its cooling efficiency will decrease, naturally lowering the refrigeration efficiency.
