Turn off the power to the air handler (inside unit) and the condenser (outside unit) at the breaker box.
Unscrew and remove the top grate of the condenser.
Vacuum leaves out of the unit.
Point the water hose straight into the condenser and spray in a circular motion from the inside outward, moving dirt and debris out of the unit's side grills.
Spray all metal parts with WD-40.
Replace the top grate on the condenser.
Open the front panel on the air handler (inside unit).
Locate the A-frame coil. Pour 1 cup of Liquid Plumber Gel or 1/4 cup of vinegar and 3/4 cup of water into the pan at the bottom of the coil. Replace the front panel on the air handler.
Locate the PVC drain line near the condenser. Suck out leaves and debris with a wet/dry vac.
Things You Will Need
- 1 cup Liquid Plumber Gel or 1/4 cup vinegar
- Water hose with spray nozzle
- Wet/dry vac
- Pull the weeds around the condenser to prevent them from growing through the vents and getting inside the unit.
- Clear the leaves from the pad your condenser sits on.