Why should I have my air conditioning evaporator coils cleaned?

Your coil sits above the heat exchanger and looks a lot like a radiator which air passes, through some systems have 2 coils in the furnace known as an evaporator coil / "A" coil and a secondary (condensing) heat exchanger, eventually build-up of dirt and grime clog the coil. This causes the air conditioning unit to run less efficiently using more energy. This places more pressure on the system causing mechanical breakdowns.

Fact did you know 1/16 inch of matted dirt on a coil can reduce the efficiency by up to 21%?