1. Neglecting your air filter.
Filters should be changed often or will restrict air flow which will reduce the efficiency and performance of your system.
2. Using the wrong filter.
The most efficient filters (highest MERV rating) are also the most restrictive and plug up so quickly that your air flow quickly decreases and your unit may quit working altogether. If you use a 1” filter, your unit will operate more efficiently if you use a lower MERV rating.
3. Crowding the condensing unit.
You unit needs space around the unit for good air flow. Bushes should be at least two feet from the unit for proper operation. Units that blow the air upwards should not be installed under decks.
4. Closing too many registers.
Homeowners often close all of their first floor registers to force more air and cooling to the second floor. Your system needs to have about 400 CFM of air flow for every ton (12,000 BTU/HR) of air conditioning. First floor registers may be partially dampered but never completely closed.
5. Leaving thermostat set to “AUTO”.
During the summer, set your thermostat fan operation to “ON”. Temperatures in your home will be more uniform and two story homes will find the cooling to the second floor is noticeably improved. In addition, having air circulating continuously feels more comfortable. Continuos fan operation does not shorten the life of the motor and uses very little electricity. One may even be more comfortable at a higher temperature setting which will result in savings on your electric bill.
6. Neglecting tune-ups and routine maintenance.
It is a fact that properly maintained systems operate more efficiently and more trouble free than neglected air conditioners. You wouldn’t sit on your patio furniture in the spring without first washing the dirt and pollution off the seats. That same pollution in addition to leaves and cottonwood cover your condenser and reduce the efficiency and performance of your system.
7. Trying to get the last hour of operation from your equipment.
Air conditioners today are far more efficient than ten years ago and have ten year manufacturer’s warranties. A normal life of a system is approximately 12-13 years in Chicagoland. If you have older equipment and have no intention on moving from your home, it might be smart to plan your replacement equipment. You will have the advantage of lower utility bills, equipment under warranty, and better performance. If you wait until it fails, you may be putting in a new system for the next owners of your home to enjoy.