Why is an evaporator coil wash so expensive?
For a split system: 1-All the refrigerant Freon must be removed from the refrigerant lines and the coil. 2-The coil has to be removed from the air handler. 3-First the coil given a chemical wash and then it is pressure washed several times. 4-The coil is placed back into the air handler and the connections are welded again. 5-The air conditioning system is then evacuated, also known as pumped down. 6-The refrigerant, Freon gas, is added and brought back to its proper level. 7-Depending on the size of the system, the charges are anywhere from $275 – $400.
