What Causes Excessive Pressure in Car Air Conditioning?

[StArabella]

Reasons for excessive pressure in car air conditioning: 1. Insufficient coolant flow or excessively high water temperature; 2. Excessive scaling or blockage in condenser copper tubes or fins, resulting in poor heat exchange efficiency; 3. Overcharged refrigerant, manifested by hot air at the exhaust outlet; 4. Presence of air in the system, requiring complete evacuation and refrigerant recharge; 5. Expansion valve failure, indicated by heavy condensation or frost on the low-pressure pipe. Check if the expansion valve is correctly installed. If properly installed, replacement is necessary. The car air conditioning system is designed to cool, heat, ventilate, and purify the air inside the vehicle, providing a comfortable environment for passengers, reducing driver fatigue, and enhancing driving safety.