Air conditioning parts and HVAC parts often break down due to extreme wear and tear that the owner doesn't realize is happening. People in warmer climates are always looking for a way to reduce wear and tear on their HVAC unit while maintaining a comfortable temperature inside their home. Nine of the most common mistakes usually result in increased electric bills instead of lower as intended.

The Bigger the Better: People often mistakenly believe that if they buy a bigger HVAC unit, it will cool their home more effectively. Unfortunately this is not the case. An oversized unit will cycle on and off too quickly, not run efficiently, and not reduce the amount of heat or humidity in the home. On the other hand, a unit that is too small will not cool effectively.

Improper Placement: Direct sunlight creates too much heat and keeps the unit from working efficiently. Always place the outside unit in the shade or in an area that does not receive a lot of direct sunlight. Consider planting medium sized shade trees nearby to help keep the unit cool as well as reduce the amount of cooling your house needs.

Hindered Ventilation: HVAC units aren't always pretty and some people try to hide them with shrubs or other plants. This hinders the ventilation the unit requires to work properly. Do not plant shrubs or tall plants within 3 feet of your unit. Use smaller plants instead and gradually make them taller as they get further away from the unit.

Ignoring Regular Maintenance: HVAC units and air conditioning parts need regular maintenance in order to perform to standards. Your regular maintenance should include changing the filter every couple of months. Also be sure to run a wire brush through the drain channels, and clean the evaporator coil once a year.

Re-cooling After Letting the Room Become Warm: Many people allow their home to warm up during the hours they aren't home. They turn the air conditioner on when they get home from work or program a thermostat to cool the home before their return. Unfortunately this does not help lower the electric bill because it takes more power to cool a warm home in lieu of maintaining a constant temperature.

Closing Unused Vents: Closing unused vents can lower the efficiency of many HVAC systems, depending greatly on the style of the home and location of the vents. It could be much more efficient to keep all vents open. Discuss these options with a trained technician.

Setting the Thermostat Too Low: Forcing the HVAC unit to work harder to cool the home to your preferred temperature doesn't help lower power bills; in fact it does the opposite. Set the thermostat where you'd like to have the temperature, and walk away.

Poorly Placed Heat Sources: Many people don't consider the effects a single light bulb or other heat source can have on the thermostat. A thermostat placed near a lamp will run more, trying to cool a home that's already cooler than it should be, because the lamp produces enough heat to trick it into over-cooling.

Run Ceiling Fans Backwards: Ceiling fans are a great way to circulate cool air in your home and create the feeling of a cooler home, even when it is not. Running a ceiling fan backwards creates a wind chill effect that makes you feel cooler.

Air conditioning parts must be maintained in order to effectively cool without increasing your power bill. Regular HVAC parts maintenance will keep your power bill lower but maintain your comfort level inside the home. Check your current habits and see if you're making any of the 9 mistakes outlined in this article.