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Air Conditioning Service

Auto AC diagramIf your car’s air conditioning isn’t working like it should, don’t worry. Dupont’s can solve the problem. Our certified A/C and heating systems technicians have serviced and repaired many types of automobile air conditioning systems.

Our auto air conditioning services includes:

  • Complete air conditioner service
  • Troubleshooting, repair and/or replacement of air conditioning parts and refrigerant
  • We provide R12 refrigerant for older vehicles
  • We provide environmentally friendly R134A Freon for newer vehicles
  • R134A conversions

From condensers, evaporators, seals, and hoses, we can repair your car’s air conditioning problems today!

The Process – Removing Heat From Air

a) A car’s air conditioning system does not create cold air. Instead, it takes the heat out of the air that is already in your car. Understanding how this works begins with understanding the various components of an automotive air conditioning system.

b) The coolant, which is often called Freon, begins in a compressor, where it is compressed into a high-pressure, high-temperature gas. It travels through lines to a radiator like device called a condenser.

The condenser mounted in the front of the car, puts the gas in contact with fresh air on the outside of the vehicle, which absorbs the heat from the gas. This causes the refrigerant to liquefy. It then flows into the dryer, where the liquid is separated from any other gases or impurities that have made their way into it during the process. The clean liquid then travels through the tubing into another radiator like device called an evaporator, inside the dash, where it turns into vapor.

Fans blow the air from the car’s cabin over the evaporator, and the evaporating liquid sucks the heat out of the air. The cool, dry air is recirculated back into the cabin, while the refrigerant, now in low-pressure gas form, heads back to the compressor to get compressed into the high-pressure gas and begin the process again.

c) Car air conditioners rely on compressible gases, such as Freon. The type of Freon that was commonly used in cars in the past, R-12, is harmful to the ozone layer. As such, it cannot be exposed to the air, which means servicing car air conditioners requires access to special machines that keep the Freon out of the atmosphere. Newer cars are being cooled with a new refrigerant, R-134a. This is less dangerous to the ozone layer. Many cars can be converted to use the less dangerous refrigerant.