Tag: subcooling

Condenser fan assembly

Can my car radiator affect my auto air conditioning?

The purpose of the fan is to maintain adequate airflow through the radiator and condenser core, especially at low vehicle speeds and when the engine is idling, sitting still.

Condensing, subcooling process and Radiator fan assembly operation

Three important things may happen to the refrigerant in The Condenser, and we need the radiator fan assembly working at maximum efficiency for The Subcooling process to happen properly:

  1. The hot gas from the compressor is de-superheated from the hot discharge temperature to the condensing temperature. The hot gas from the compressor may be 200 °F or hotter on a hot day on an air-cooled system. De-superheating is accomplished in the beginning of the coil.
  2. The refrigerant is condensed from a vapor to a liquid. This is latent heat transfer. This is done in the middle of the coil, the only place that the coil temperature will correspond to the head pressure.
  3. The liquid refrigerant temperature may then be lowered below the condensing temperature, or SUBCOOLED. The refrigerant can usually be subcooled to between 10 °F and 20°F below the condensing temperature.
  4. Condensers have a relationship to the temperature of the air passing over them. For instance, the refrigerant inside the coil will normally condense at a 30°F higher temperature than the air passing over it.


What happens if your radiator fan stops working?

The condensing and subcooling process that happens in the condenser will stop or won’t happen as efficiently and the car a/c system performance will greatly decrease. The main effects are excessive high pressure in the air conditioning system. Automotive ac compressor lubrication is negatively impacted due to the high oil temperature that results from a lack of radiator fan assembly operation. Too high oil temperature will change the oil properties and will affect the hvac compressor internal lubrication and the a/c compressor pumping capacity.


Radiator fan assembly inspection

If your auto ac system is not cooling at 100% capacity it might be related to the radiator fan assembly operation. Call Us today ! We have auto ac repair mechanics near you.