What Causes the Low-Pressure Pipe of a Car Air Conditioner to Freeze and Stop Cooling?
1 Answers
Car air conditioner low-pressure pipe freezing and failure to cool is caused by insufficient refrigerant, a dirty condenser, or moisture in the refrigerant. Below are detailed explanations of the causes and solutions: Insufficient Refrigerant: Minor leaks lead to a lack of refrigerant. Adding refrigerant can solve the issue, but it's important to note that if adding from the low-pressure side, the refrigerant bottle must not be inverted. If adding from the high-pressure side, the engine must not be started. Dirty Condenser: The car air conditioner condenser's role is to dissipate heat and cool the high-temperature, high-pressure refrigerant vapor discharged by the compressor, condensing it into a high-pressure liquid refrigerant. A dirty condenser reduces cooling efficiency. It is essential to promptly clean out impurities and scale from the condenser, and replace the condenser if necessary. Moisture in the Refrigerant: The presence of moisture in the refrigerant degrades the air conditioning system's performance. Replace the desiccant or dryer in the car air conditioner, and at the same time, evacuate the system to create a vacuum before refilling it with the appropriate amount of new refrigerant to resolve the issue.
