Call an AC contractor
To clean your indoor evaporator coil, the contractor will most likely clear larger debris by hand or with a special brush, then follow up by applying a self-rinsing evaporator oil product. This product will clean the coil effectively and rinse off during the cooling process when the system is turned on.
Clean your indoor & outdoor coils
The indoor coil acts as an evaporator coil for heating.
The coils can be cleaned using a coil brush and foaming coil cleaner. These items are available at www.appliancepartspros.com.
The coil that serves the inside of the house is called the indoor coil. The reason is that the indoor coil is a condenser in the heating mode and an evaporator in the cooling mode.. (pg. 1077)
You do not need to pump the system down just to clean the coil unless you are planning to remove the coil completely from the unit.
Check for clogged or dirty air flow paths, and clean the evaporator coil. Clean and Treat the condensate pan and clean the condensate drain line. Check for proper operation of the blower.
The coil is inside. Check to see if the filter is dirty as well. To clean the coil you must remove the front panel to the evap coil. If you have a flat coil you must slide the coil out to clean it. If you have an A coil, take off the plate on the front of the coil and you should be able to visually inspect the coil. It is important that you do not mash the dirt into the coil fins.
Change the filter and clean the coil. If it smells like a dead animal clean your duct work.
You mean ac coil, the secondary coil, of a transformer? Then for the purpose of rectification, that is , for changing ac into dc, a diode is connected in series with the secondary coil of the transformer.
It is going to be part of the "indoor" evaperator coil. If you know the Brand of the INDOOR COIL and can get the model number you should be able to find a picture of the components on the manufacturers web site or by searching for it on a search engine such as Google or Ask! .com Also you will have a drain line that connects to the outdoors unless it is a window unit.