The first and most basic step to take to prolong your ac units life is to change the filter. You ought to change it whenever it gets filthy. Depending on the use, that might range from every three to six months. There are some filters out there which can last up to a year For Info visit . Ask somebody in the hardware store for more ideas.
Once a year, make certain that you inspect the evaporator coil located inside the air handler to make sure there is no dust build up. When the weather condition starts to cool, you ought to inspect the outside of the air conditioning unit. You ought to check around the unit and make sure there is no debris on the surface of the condenser, as that will stop airflow. Also, you ought to check between the fins of the condenser to see that its not congested with dead bugs or pollen. Spraying the condenser with a hose will normally be good enough to get rid of all the debris.
Although many air conditioning units today use direct drive motors, it is a great idea to inspect the belt in the air handler. You may need to change it. If no change is needed, you may only need to oil the motor bearings once a year.
It is also great to inspect the contactors and various other electrical parts; most of them are located inside the condensing unit. The contactor runs the compressor, and the contacts get pitted and have to be changed occasionally. Various manufacturers utilize different kinds of contactors, so review the manual to discover exactly what kind you need.