How to Get Your Air Conditioner Ready for Summer

Prepare your AC for summer by cleaning or replacing the filter, clearing debris from the outdoor unit, and testing the system before hot weather arrives.

1. Cut Power First Always. Switch off the circuit breaker to your AC unit and turn off the power switch at the outdoor condenser. Safety first - never work on electrical equipment while it's powered on.
2. Swap Out the Filter. Remove the filter from your indoor unit. If it's disposable, replace it with a new one of the same size. For reusable filters, rinse with water, let it dry completely, then reinstall. A clean filter improves efficiency and air quality.
3. Clear the Condenser Zone. Remove leaves, grass clippings, and debris from around the condenser unit. Trim back vegetation to maintain at least two feet of clearance on all sides. This ensures proper airflow and prevents overheating.
4. Rinse the Coils Clean. Spray the outdoor coils gently with a garden hose from inside out to remove dirt buildup. Don't use high pressure or you'll damage the fins. For heavy buildup, use a soft brush or purchase coil cleaner from a hardware store.
5. Straighten Every Fin. Examine the aluminum fins on your outdoor unit. If any are bent, carefully straighten them with a fin comb or butter knife. Bent fins restrict airflow and reduce efficiency.
6. Insulate the Lines. Inspect the insulation around the refrigerant pipes leading to your house. Replace any damaged or missing insulation with new foam pipe insulation from the hardware store. This prevents energy loss.
7. Verify Thermostat Works. Replace thermostat batteries if needed. Set it to cooling mode and lower the temperature 5 degrees below current room temperature. The system should kick on within a few minutes.
8. Run a Full System Check. Restore power to the unit and let it run for 15-20 minutes. Check that cold air flows from vents, the outdoor unit runs quietly, and there are no unusual sounds or smells. If anything seems off, call a technician.