Is my auto ac condenser operating properly

Is my auto ac condenser operating properly ?

How do I know if my auto ac condenser is operating properly ?

To know if the auto ac condenser is operating properly we need a set of air conditioning gauges and accurate thermometer to measure outside ambient temperature ,condensing saturation temperature and subcooling temperature. The readings will be compared to a pressure/temperature chart for the corresponding refrigerant used in the vehicle. The readings must be in the range specified by the manufacturer and the pressure/temperature saturation chart.

The conditions for condensing are determined by the efficiency of the condenser and the heat load put on the condenser. A standard condenser ,has a condensing temperature about 30-35 F higher than the surrounding air used to absorb heat  from the condenser. Some condensers are more efficient than others and the relation between the outside air and the condensing temperature will be lower .Condensing temperatures and pressures are also dependent on the heat load given to the condenser to reject. The higher the heat load, the higher will be the condensing temperature and the corresponding pressure. The performance of the ac condenser will change according to the outside ambient temperature.

For example, if the outside ambient temperature rises to 105 F degrees , the condenser saturation temperature would rise to about 135 F

Symptoms of a bad or failing ac condenser

  • Higher relationship between condensing temperature and outside ambient temperature.
  • Higher A/C system head pressure
  • Lower A/C compressor capacity.
  • Condenser fan assembly operating on high continuously


How to properly install an ac condenser


When installing a replacement condenser,  measure the amount of oil found in the component that was removed, and then add that same amount of oil, back into the condenser prior to recharging. If oil has leaked out of the system, use the manufacturer’s recommended amounts.

  • Torque all fasteners to manufacturer’s specifications.
  • Replace o-rings
  • Evacuate and recharge the system
  • Check for leaks
  • Check A/C system performance.

Do you need assistance checking the ac condenser operation in your vehicle ?

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