Most air conditioning units work properly for about 10 to 12 years. If your air conditioner is slightly old and you cannot afford a new air conditioning unit, then you should try to get the most out of it by following a few basic tips.

The most important thing to do if you want better efficiency from your existing air conditioner is to maintain it properly. Regular maintenance and servicing will ensure that you get trouble free performance from your air conditioner for years to come.

Do not use your air conditioner excessively. You should use air conditioning only when the ventilation is inadequate. Always switch off your air conditioner whenever you are leaving home. This will help you in saving considerable amount of energy. Whenever you operate an air conditioner unit, keep all the doors and windows closed. Try to avoid cooling rooms that are unoccupied.  By minimizing the indoor humidity and using an exhaust fan, you can save on your electricity bills. If your air conditioning unit has an outside air option, you should use it sparingly.

By using ceiling fans and setting the thermostat at a higher temperature, you can save a lot of energy. For every degree you raise on the thermostat, you can save 3 to 5 percent on the cooling cost. Regularly clean the air filters of your air conditioner. Always ensure that the filter of your air conditioner does not get very dirty as it can impede air flow. You should hire a professional for inspecting your air conditioner every 2 to 3 years or more frequently if you use it more often.