Clean the area with the oven and air conditioning unit. Clean the evaporator and condenser coils. Remove dirt, dust and debris from the fan. Do not allow the condensate drain to become clogged.
Check and clean air ducts as needed. The most important maintenance task that will ensure the efficiency of your air conditioner is to replace or clean your filters on a routine basis. Dirty, clogged filters reduce the amount of air flow and significantly reduce system efficiency. In addition, when airflow is obstructed, air can bypass the filter and deposit dirt directly on the evaporator coil, which impairs the heat absorption capacity of the coil.
Replacing a dirty, clogged filter with a clean one can reduce air conditioning energy consumption by 5% to 15%. Drain pipes, coolant pipes, exhaust ducts, and condensate pipes can leak that prevent operation or damage your home.