Split System Central Air Conditioner Home Maintenance

Monthly

• Inspect, clean, or replace the filters in your heating and air conditioning ducts.

Annually:

Perform maintenance in the spring, prior to the major cooling season, but when the temperature is 65 degrees Fahrenheit or higher.


Remove debris and foliage around the air conditioning unit. Use a rake, pruning shears, and other tools as necessary to clear an area 3 or 4 feet around the unit.
Inspect the air conditioning unit base pan. If the pan does not drain properly, remove obstructions as necessary to restore proper drainage.

Inspect the coils (fins) and cabinet. If the unit has collected debris such as cottonwood seeds, dandelion seeds, leaves, or dust, clean the unit by performing the following steps:

•   Turn off electrical power to the unit at a shut-off or disconnect near the unit, or at the main electrical panel.
• Taking care not to damage the fins (they are extremely fragile), carefully remove the cover.
• Vacuum the fins gently to remove debris.
• Wear safety goggles to protect your eyes from splashing water. Take care not to get water on the motor or electrical wiring or components. Rinse the fins gently with low-pressure water. Take care not to damage the fins. Rinse the fins from top to bottom to remove dust, dirt, and other debris from between the fins.
• If necessary, gently straighten bent fins using a comb or other appropriate tool.
• Lubricate the fan motor if the users’ manual recommends. Do not over lubricate.
• Re-install the cover, taking care not to damage the fins.
• Turn the electrical power on.
• Ensure the air conditioner is operational. A timer inside the unit may delay startup by up to 5 minutes. After the unit operates for a few minutes, feel the two refrigerant tubes. One should be warm, and the other should be cool.
•  If you suspect a problem, contact a service technician.
• Inspect the refrigerant tubing and insulation for damage. Replace damaged or missing insulation. If the tubing is damaged, contact a service technician for repair.
• Inspect air vents in your home to ensure they are not obstructed.

If you perform these simple maintenance tasks, you will reduce your energy costs, improve your system performance, and extend your equipment life.