Air Conditioning Service

The air conditioning unit in your vehicle operates similarly to a refrigerator. Your vehicle’s air conditioning unit is designed to move heat from the inside of your car to outside of it.

Your vehicle’s air conditioning unit has six major components:

  • The refrigerant carries heat. In modern cars, refrigerant is a substance called R-134a. Older cars’ refrigerant is called r-12 freon, which is more expensive and difficult to find than R-134a.
  • The compressor circulates and compresses refrigerant within the vehicle’s cooling system.
  • Your vehicle’s condenser changes the refrigerant from gas to liquid and expels heat from the car.
  • The expansion valve (sometimes called the orifice tube) is a nozzle that simultaneously drops the pressure of the refrigerant liquid, meter its flow and atomize it.
  • Your vehicle’s evaporator transfers heat to the refrigerant from the air blown across it, cooling your car.
  • The receiver or dryer filters your vehicle’s refrigerant and oil, removing moisture and other contaminants from them.

When you start your vehicle’s air conditioning system, the compressor works by putting the refrigerant under pressure, sending it to the condensing coils, which are generally in front of your vehicle’s radiator. The condenser expels hot air to outside the car, cooling the air within the vehicle. When this happens, the refrigerant is cooled, and it changes form a gas to a liquid, which then passes through the expansion valve and to the evaporator.

Once the evaporator receives the liquid-state refrigerant, it loses pressure and cools the remaining liquid. The vehicle’s blower moves air across the evaporator and into the vehicle’s interior. If you keep your air conditioning unit turned on, the refrigerant goes through this cycle continuously.

If any of these components is damaged, it can turn your cool car into a furnace during the summer months. Your vehicle’s air conditioning issue could be as simple as topping off refrigerant to replacing a valve. When your air conditioning unit is not working as it should, bring your vehicle to Legacy Automotive Inc.. One of our trained air conditioning specialists will inspect your car’s air conditioner, all lines, the evaporator and the compressor for leaks and wear.

With the extreme temperature changes in Boulder, having your air conditioning working proper is a must for our climate.

Air conditioning is vehicles has been around probably a little longer than you think. Packard Motor Car Company was the first to offer A/C units in its vehicles. The systems were crude in 1933. There was no on/off switch and the units used up most of the trunk space.

A small leak in the system can cause a lot of damage if not diagnosed soon enough. This can cause your A/C to go from cold to start warming up. Sometimes it might not even blow cold at all. And we all know that we don’t need to be putting any more chemicals into our environment.

Most A/C units don’t have warning lights like your alternator or engine cooling system. Some cars that are equipped with a Driver Information Center (DIC) and might be able to provide a warning.

Regular maintenance on your A/C system by a qualified technician can save you money in the future. Our technicians have all of the proper equipment to perform a complete diagnosis on your system for any leaks before they become big leaks and cause serious damage to the system.


1900 55th Street
Boulder, CO 80301