Why Can't Refrigerant Be Added to the Car Air Conditioner?
2 Answers
If the low-pressure side is high and the high-pressure side is low, it may indicate that the compressor is damaged. In such cases, refrigerant cannot be added. The most common symptom of a dirty or clogged expansion valve is frosting. Below is an introduction to car air conditioning: 1. Introduction to Car Air Conditioning: The car air conditioning system consists of a compressor, condenser, throttle element, evaporator, fan, and necessary control components, designed to regulate the temperature and humidity inside the vehicle, providing a comfortable environment for the driver. 2. Working Principle: When the compressor operates, it sucks in low-temperature and low-pressure gaseous refrigerant from the evaporator. After compression, the temperature and pressure of the refrigerant increase, and it is sent to the condenser. Inside the condenser, the high-temperature and high-pressure gaseous refrigerant transfers heat to the outside air passing through the condenser, causing it to liquefy and turn into a liquid.
Last summer when I drove, the AC wasn't cooling properly. I bought a can of refrigerant and tried to recharge it myself but couldn't get it filled no matter what. I suspect there might be a leak in the system causing incorrect pressure, or the compressor wasn't running properly when the engine was on. A friend reminded me to ensure the engine was running and the compressor was engaged before recharging, but I overlooked this. Later at the repair shop, they found a small leak using soap bubble testing. My advice is don't attempt DIY fixes when encountering similar issues - forcing refrigerant recharge may worsen leaks or even damage the system. It's safer to get professional inspection early.
