Do you usually freeze when you go shopping at the grocery store? You are not alone, but the A/C system is not set to make the customer comfortable, it is because the food must be kept cool/cold. The amount of air conditioning that goes through a grocery store on a daily basis is incredible. Grocery stores in the U.S. spend an average
of $3.95 on electricity per sq. ft. annually. Having an A/C system that is working to its fullest abilities is important. Continuous maintenance and repairs to an existing system may mean you need a newer, larger or more efficient air conditioning system.
Change filters every month—more often if you’re located next to a highway or construction site where the air is much dirtier. Check cabinet panels. On a quarterly basis, make sure that the panels to your rooftop air-conditioning unit are fully attached, with all screws in place, and that gaskets are intact so no chilled air leaks out of the cabinet. Such leaks can cost $100 per year per
rooftop unit in wasted energy.
Clean condenser coils
Check condenser coils quarterly for debris, natural or otherwise, that has collected there. At the beginning and end of the cooling season, thoroughly wash the coils.
Many air-conditioning systems use a dampered vent called an economizer to draw in cool outside air when it is available to reduce the need for mechanically cooled air. The linkage on the damper, if not regularly checked, can seize up or break. Have a licensed technician calibrate the controls; check, clean, and lubricate your economizer’s linkage about once a year; and make repairs if necessary.
Check for airflow
Hold your hand up to air registers to ensure that airflow is adequate. If there is little airflow or dirt and dust are found at the register, have a technician inspect your unit and duct work.