The aluminum fins on the evaporator and condenser coils are easily bent and can block airflow through the coil. Air conditioning wholesalers sell a tool called a “fin comb” that will comb these fins back into nearly original condition.
Occasionally pass a stiff wire through the unit’s drain channels. Clogged drain channels prevent a unit from reducing humidity, and the resulting excess moisture may discolor walls or carpet.
Having your air conditioner routinely inspected for safety and proper operating efficiency will prolong the service life of the entire system. Having the safety features of your air conditioner or furnace inspected is a good idea since failures of the safety devices may cause damage or even catastrophic damage to your home. Inspections by a qualified and licensed HVAC contractor should always include a safety inspection.