How can a dirty cabin air filter affect the car's heater ?


               Many vehicles have a cabin air filter (pollen filter) to clean the air inside your car. These filters stop dust, pollen and other pollutants from the air you are breathing while driving along. These filters not only clean the air, but help keep the interior cleaner by filtering out the dust that the HVAC (Heating, Ventilation and Air Conditioning) system would normally just blow into and around the insides of your car.
             These cabin air filters are located in the HVAC case, most often behind the dashboard of the vehicle, some are located under the hood of the vehicle (check of your owners manual will tell you for sure). All of the air entering the vehicle, when the windows are closed of course, comes through the HVAC system. The heater, defroster, vent and air conditioner all get their air supply filtered through the cabin filter.
               The cabin filter is much like the air filter your engine uses to keep its air supply clean. Pleated paper or fabric is mounted to a frame which is then fitted into the HVAC case. These cabin filters can also be electrostatically charged to further enhance their air filtering abilities by attracting more pollutants.
              The filter itself is strategically placed in the air stream of the HVAC system so that while filtering the air efficiently, it is also easily accessible for maintenance. The fan, or fans, of the HVAC system pulls outside air into the vehicle, pushing it through the heating or air conditioning elements, regulating its temperature, then blowing it through the filter before it enters the cabin. In the even that the air conditioning system is in recirculate mode, that is when the system is not pulling outside air into the cabin, the air is still blown through the filter before re-entering the cabin area.


                                       What Does an Air Filter Do?



               For your engine to run, it needs air. The air mixes with gas, the spark plug gives a spark, and-presto!-you’ve got internal combustion. For an engine to run efficiently, the air that it takes in needs to be as clean as possible. Problem is that the air outside is full of junk that doesn’t burn cleanly or evenly at all.  Dirt, pollen, salt, and bird feathers are just some the things your engine will suck in to create the controlled explosion that moves your motor.  You don’t want that stuff in your engine. Air filters are connected to the engine’s intake manifold. Most filters are rectangular (older cars that have carburetors use a donut-shaped air filter) and are made of a porous, paper-like material, folded like an accordion.


          Why Do You Need to Change Your Air Filter Regularly?



                Increased fuel efficiency. After logging thousands of miles on your car, that filter can get really dirty and clogged. A dirty air filter doesn’t allow air to get through to the engine. Remember, your engine needs air to run efficiently. A reduced amount of air means your engine needs to use more fuel to get the same bang to run your engine.  Save yourself some money at the pump. Change your air filter regularly.
               Prolonged engine life. Engines are big and powerful, but they can be surprisingly sensitive to the smallest grain of sand. Over time, dirt and other particles can cause serious damage to your engine’s internal parts. Better to spend $10 now on a new air filter than thousands of dollars later on a new engine.
               Reduced Emissions. Reduced air flow can also mess with your car’s emission control systems causing you to spew more bad stuff into the atmosphere. Men need polar bears to wrestle. Save one by changing your air filter.

                                      How often should I change my fuel filter ?


               A fuel filter is a filter in the fuel line that screens out dirt and rust particles from the fuel.

                  Your car's fuel filter is located between the fuel tank and the fuel pump. As the fuel pump pulls fuel toward the engine, the fuel filter removes any impurities that could clog your fuel injectors and keep your car from running smoothly.
                   Fuel filters need to be maintained at regular intervals. This is usually a case of simply disconnecting the filter from the fuel line and replacing it with a new one, although some specially designed filters can be cleaned and reused many times. If a filter is not replaced regularly it may become clogged with contaminants and cause a restriction in the fuel flow, causing an appreciable drop in engine performance as the engine struggles to draw enough fuel to continue running normally.  
                  Replacing the fuel filter periodically (every year or so) for preventative maintenance can reduce the risk of filter-related driveability problems.

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