Getting to Know Your Auto AC System

by

Colleen Hensley

The auto air conditioner in your Nissan Maxima is basically nothing different with the ones installed in homes, except that it is in a mobile and uncanny layout. It functions much the same as any air conditioner would, processing the air that circulates in the cabin by managing the transfer of heat from the inside to the outside of the auto through a close-ended and distinct mechanism of liquefying Freon gas refrigerant through a Nissan Maxima AC Condenser and pumping it through to the other parts of the cooling system.

It works altogether with the compressor, which compresses and circulates the refrigerant–R-134a for modern autos and R-12 Freon for older ones– which carries the heat. The heat the refrigerant picked up in the evaporator is expelled to the air flowing across it from outside the auto. When the refrigerant is cooled to its saturation temperature, it will change phase from a gas back into a liquid. It passes through the expansion valve and functions to simultaneously drop the pressure of the refrigerant liquid, gauge its flow, and atomize it. The liquid then passes through the expansion valve to the evaporator, and loses pressure as it goes through the Nissan Maxima AC Condenser coils causing some of the liquid to change to a low-pressure gas as it cools the remaining liquid. This mixture enters the evaporator; the liquid portion of the refrigerant absorbs the heat from the air across the coil, the gas evaporates. The fan circulates air across the cold evaporator into the interior, then the refrigerant undergoes the same cycle over and again. If your AC is not cooling properly or tends to overheat, chances are there are problems in one of the components. Three possibilities would be: (1) There is a leak in the Nissan Maxima AC Condenser due to rust and corrosion or punctured by a sharp object; (2) a foreign object has obstructed the passage of the refrigerant and clogged the tubes; (3) Part of the coils or tube is bent or kinked and has caused restricted passage due to being hit by an outside object or excessive pressure effected by the compressor. The most popular and common solution people do is to flush the system, but not all manufacturers recommended it because they were not made to be flushed. Instead, what is usually done is replacement of the defective parts, including installation of a new filter and refrigerant. — About the Author: A management trainee, the adventurous car quests of Colleen Hensley was wielded thru her auto mechanic father whose greatest delight is mentoring her with stuffs like the Engine, Exhaust, AC Condenser, and the like.

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Getting to Know Your Auto AC System