How to Fix Split Air Conditioner Restriction

The split air conditioner in many homes is a dirty and contaminated unit, clogged with dust and grease. This can contribute to the air flow becoming narrower, and air conditioner vent restriction; and a dirty filter can seriously inhibit the output of the split air conditioner. Sometimes a simple clean of the filter and surrounding components can get the AC unit back on track.

Leaves and garden materials are a common source of blockages on the outside vents and the condenser. When installing the AC unit, it should have been placed 2 feet away from plants and vegetation, but if you have had the split air conditioner for many years, trees and foliage can have encroached upon the condenser, preventing adequate air space. Leaves, twigs, and even insects can fall into the condenser from nearby trees, and this all must be removed in order to get the best from your AC unit.

Leaking Split Air Conditioner

Sometimes, due to the restriction of vents and filters, AC unites can begin to leak inside the house, leaving small pools of liquid on carpets and furniture. This can be caused by large particles of dirt and moisture blocking draining pans. Another cause of leakage can be a clogged weep hole, which takes moisture away from the evaporation unit. Mold can also grow here, so it is essential to keep this area clean and blockage-free.

Fixing the Problem

Dirt and debris should be minimized around the condenser unit and inside AC units. On the outside, clean away the area around the coil, taking out debris and hacking back the leaves of nearby plants to at least 2 feet from the condenser.

If the entire AC unit is more than 2 years old, the best way to manage removing blockage and dirt is to follow a few simple steps:

  1. Remove the grill from the condenser using a knife or screwdriver.
  2. Unplug the AC unit, remove from window cabinet and stand on a table.
  3. Find the filter covering the radiator fins on the evaporator coils.
  4. Remove this filter and place in a bowl of soapy water mixed with bleach. Wash thoroughly to remove mold and other particles, and leave to dry.
  5. Vacuum the evaporator coils with the brush vacuum attachment. Remove any uncooperative with a scrubbing brush.
  6. Push a piece of wire through the weep hole, taking care not to damage the area.
  7. Turn the split air conditioner unit over, vacuum the condenser coils, brushing carefully to ensure they are completely clean. You may also choose to add a condenser cover, which will help keep the AC unit clean in future.
  8. Search inside the unit, and remove any trapped dir.
  9. Reinstall the split air conditioner into the window.

Scrub the entire bottom of the unit with a stiff-bristle brush. Also clean the tray below the evaporator unit, and add a spoonful of household bleach to prevent mold growth.