Split-system air conditioners have a compact outdoor unit, containing one or more compressors, which serve several indoor air handlers. Rigid conduit circulates refrigerant back and forth between the compressors and the air handlers, eliminating the need for ducts. Each indoor air handler is individually controlled by a built-in thermostat or by a remote, hand-held control.
Have split-system air conditioners professionally serviced every two years. Heat pump models, which provide heating and cooling throughout the year, should be serviced annually.

Maintaining the Outdoor (condensing) Unit
Rinse off dirty outdoor coils (they’re housed with the compressor) with a hose. Use a mild detergent and soft brush if there’s pine resin or other stubborn dirt on the coils. At the same time, wipe off the fan blades. If the fan is belt-driven, check the belt for snugness and wear.
To ensure top performance, grass, shrubs, and leaves should be kept well back from the outdoor unit. If the outdoor unit is exposed to a lot of direct sunlight, you’ll boost system performance by erecting a lean-to above it to provide shade. A lean-to will also protect the unit from rain and snow.

Maintaining Air Handlers
Each spring, remove the filter on each indoor air handler and gently wash it according to the manufacturer’s instructions.
If you’re meticulous about keeping the filter clean, the coil inside won’t require frequent cleaning. When it does need cleaning, remove the grille and clean the coils with a vacuum or a mild, degreasing detergent and an old toothbrush. Gently wipe off the fan blades before you close up the unit.

If you enjoyed this post, make sure you subscribe to my RSS feed!