Maintaing and Servicing

Regular Maintenance

• Clean or replace filters regularly (every two to six months, depending on operating time and amount of dust in the environment).
• Clean outdoor coils as often as necessary (when dirt is visible on the outside of the coil).
• Remove plant life and debris from around the outdoor unit.
• Clean evaporator coil and condensate pan every two to four years.
• Clean the blower's fan blades.
• Clean supply and return registers and straighten their fins.

Professional Maintenance

• Inspect ducts, filters, blower, and indoor coil for dirt and other obstructions.
• Diagnose and seal duct leakage.
• Verify adequate airflow by measurement.
• Verify correct refrigerant charge by measurement.
• Check for refrigerant leaks.
• Inspect electric terminals and, if necessary, clean and tighten connections and apply nonconductive coating.
• Lubricate motors, and inspect belts for tightness and wear.
• Verify correct electric control, making sure that heating is locked out when the thermostat calls for cooling and vice versa.
• Verify correct thermostat operation.