Maintenance Hints for Getting the Most Comfort and Highest Efficiency From your HVAC System

First, follow manufacturer’s routine maintenance directions. Second, have entire system checked twice a year by a qualified service person. An annual service check should include such inspections/items as:

Condenser Units (Outside Unit):

  • Lubricate condenser fan bearings (if not permanently sealed)
  • Clean air intake side of condenser coil
  • Tighten electrical connections
  • Check operating current with volt amp meter
  • Check supply voltage with volt amp meter
  • Check refrigerant levels and pressures
  • Inspect compressor start and run capacitors

Furnace / Air Handler:

  • Clean or replace filter
  • Lubricate unsealed blower fan motor and blower bearings
  • Check and adjust fan belt tension/condition
  • Clean blower wheel
  • Inspect/adjust burner
  • Clean evaporator coil and check fin condition
  • Clean and inspect drain lines and pan
  • Check for excessive attic air leakage into return chamber


  • Permanent-Clean with mild detergent, per manufacturer’s recommendations, every 30 to 60 days
  • Replaceable-Replace every 30 to 60 days

Duct Work

  • Check for air leaks, particularly at furnace/air handler. Seal leaks with duct tape
  • Ductwork should be insulated with at least 1-1/2″ of batt insulation with a foil or vinyl vapor barrier on the outside

Windows & Doors:

  • Keep closed when system is running
  • Caulk and weather-strip to close air gaps
  • Open drapes and shades over windows facing sun


  • Wash/dry clothes during warmest times of day (late morning and afternoon)
  • Use exhaust fan when cooking only when needed
  • Keep thermostat at desired setting


  • Check thermostat for proper operation and calibration
  • Measure air temperature at supply and return vents