What Causes Normal Air Conditioning Pressure But No Cooling in Cars?

[LeVera]

Refrigerant Shortage: Car air conditioning systems typically require refrigerant recharge every 2-3 years, with some vehicles needing annual top-ups. Even with excellent system sealing, refrigerant can still escape, especially when there are minor leaks in AC lines or the condenser. Damaged Air Blend Door: While rare, failures of the air blend door actuator do occur. This critical component located in the lower dashboard area serves as the master switch for air distribution. When faulty, cooled air can only escape through gaps rather than flowing properly through vents. Dirty Condenser: During summer when AC performance drops despite normal system pressure readings, dealerships often recommend radiator cleaning. The condenser's primary function is heat dissipation - when clogged with spring pollen or cottonwood seeds, it leads to engine overheating and poor AC performance.