Air-conditioning, or AC, units are a great way to stay cool during the hot summer days. They circulate the air, pulling hot air out of the house, while sending cold air back in. Circulating air, however, also circulates dust, hair and other airborne dirt that can build up on the AC coils. Evaporator coils are on the unit inside the house, usually where the duct connects to the AC unit.
Detach the duct from the AC unit. It will usually be attached by screws, so simply removing them will allow you to pull it away.
2
Remove the grill covering the coils. On many units, you'll simply snap off the grill. Some designs may require using a screwdriver to remove additional screws.
3
Remove the filter covering the evaporator coils. In most cases, the filter can be pulled out without any extra tools.
4
Spray the foam spray evenly across the coils. Let the spray sit on the coils for a while before using the AC again. Individual products will have instructions for how long to wait.
5
Run the AC for a while to clear the coils of any remaining foam. This will also help disintegrate the foam if there is any remaining on the coils.
Tips & Warnings
While you have the filter out, you should wash or replace it. This will help keep the evaporator coils cleaner for a longer period of time.
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