Weak cooling, high humidity indoors, musty odors or water around the air handler are worth describing.
Attic, closet or garage: the location of the air handler affects access.
The power is switched off and the coil cabinet is opened.
The coil is cleaned and the drain pan cleared.
The cabinet is sealed and the system run to check drainage and operation.
Dust on the coil reduces heat transfer. ENERGY STAR lists cleaning evaporator and condenser coils as part of a cooling check.
No. The evaporator coil is indoors; the condenser coil is in the outdoor unit. Both can be cleaned.
Moisture and dust on the coil and in the drain pan can contribute to musty odors.
Have it checked during your annual cooling tune-up and cleaned when buildup is found.
