Air handler units are located indoors usually in a closet or attic.
Cleaning evaporator coil in attic.
By annually cleaning the evaporator coils of air handling units before the cooling season starts you can increase your a c system s cooling efficiency and overall life expectancy.
Brush cleaning allows you to avoid the use of liquids or chemicals and gives you greater control on the pressure applied to the coils and fins.
However if dust or dirt contamination is so extensive that the inside coil surfaces are affected too schedule a more extensive heavy duty cleaning procedure with your hvac.
The most basic way to keep evaporator coils clean is to make sure your ac unit has clean air filters installed.
Usually this is located in an attic or closet.
The air filters will capture most of the tiny debris that could cause trouble for your system 4 though regular cleaning will still be necessary the coils will be much cleaner if the air filter is cleaned and replaced when needed.
It usually looks like a light switch inside of a grey box located in the attic.
Next you need to find the coils themselves.
The external surfaces of the evaporator coil that face the airflow in the duct are accessible and cleaning is generally within the skill level of most do it yourselfers.
Turn off power to the air handler by flipping the toggle switch near the air handler the.