- 1). Turn off the air conditioner at the thermostat.
- 2). Unscrew the screws that hold your air handler access panel in place and set the panel and screws aside.
- 3). Brush the dust on the coils with light pressure from a soft bristle utility brush.
- 4). Vacuum the accumulated dirt and dust from the air handler with a hand held vacuum. Be careful not to touch the vacuum to the coils and damage them.
- 5). Spray a consistent, light coat of foaming, no-rinse, coil cleaner on the coils.
- 6). Verify that cleanser is draining from the drain pan into the PVC drain, after the cleaner breaks down and liquefies. Flush the drain with a quart of a mixture of equal parts bleach and water, to completely remove the cleanser from the system.
- 7). Replace the access panel and screw it in place with the screws you removed previously.
- 8). Turn the air conditioner back on at the thermostat.
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