This is a list of the most common car a/c failures that lead to a no cooling ac condition in any vehicle:

• A/C Refrigerant leaks
• A/C Refrigerant contamination
• A/C Refrigerant overcharge condition
• A/C system non-condensable gases contamination
• A/C refrigerant oil ,overcharge condition
• Weak A/C Compressor
• Faulty valve, on electronically controlled variable displacement a/c compressor  
• Faulty A/C Compressor Clutch Relay
• Faulty A/C Compressor clutch coil
• Inoperative A/C Compressor
• Engine cooling system affecting A/C operation
• Leaking Heater valve
• Externally restricted A/C Condenser
• Internally restricted A/C Condenser
• Externally restricted engine cooling radiator
• Faulty Outside Ambient  Temperature sensor
• Faulty Pressure sensor/switch
• Faulty Evaporator Temperature Sensor
• Faulty electric wiring
• Open fuses
• Restricted A/C Cabin-filter
• Restricted evaporator coil
• A/C Door Actuator malfunction
• A/C Temperature Door Actuator stuck in the heat position
• Faulty Expansion Valve
• Faulty Fixed Orifice Tube
• Bad drive belt tensioner
• Worn down a/c compressor drive belt

Why is my car AC running but not cooling?

Newer automotive air conditioner systems have the a/c compressor always operating. The a/c compressor pulley is constantly rotating but the a/c compressor output is controlled in many cases by the ECM or the PCM in the vehicle. The Powertrain control module (PCM) or Electronic controlled Module (ECM) will receive input from different sensors in the vehicle and will command a/c compressor output accordingly.

Do you need assistance with a poor a/c cooling performance ?

Call Today to set an appointment for a complete air conditioner system checkup in your vehicle. Early preventive service could save you a lot of money.