Thermal Zone Recommended Maintenance

Regular HVAC preventative maintenance is the best way to ensure peak performance & trouble-free operation. Pre-season maintenance is also important. It can help to avoid a system failure in severe hot or cold weather when you need it most, and it can also keep your energy bill from getting out of control.

WHEN SHOULD I DO FURNACE MAINTENANCE?

Below you’ll find our Preventative Maintenance guide, which is our proven method to check your system and your home in constant comfort.

  • For a system that heats and cools: perform maintenance in the spring and fall
  • For cooling system maintenance only: perform maintenance at least once a year, before the cooling season
  • For furnace maintenance only: perform maintenance at least once a year, before the heating season.

OUTDOOR UNITS CHECK LIST

  • Inspect unit for proper refrigerant level and adjust if necessary
  • Clean dirt, leaves and debris from inside cabinet
  • Inspect base pan for restricted drain openings—remove obstructions as necessary
  • Inspect coil and cabinet—clean as needed
  • Inspect fan motor and fan blades for wear and damage—on older models lubricate as needed
  • Inspect control box, associated controls/accessories, wiring and connections. Controls may include contactors, relays, circuit boards, capacitors, sump heat and other accessories. All control box and electrical parts should be checked for wear or damage.
  • Inspect compressor and associated tubing for damage

INDOOR UNITS

  • Inspect and clean blower assembly (includes blower housing, blower wheel and motor)
  • On older models, lubricate motor and inspect and replace fan belt if needed
  • Check combustion blower housing for lint and debris and clean as necessary
  • Inspect evaporator coil, drain pan and condensate drain lines. Clean as needed
  • Inspect for gas leaks in gas furnaces
  • Inspect burner assembly—clean and adjust as needed
  • Inspect ignition system and safety controls—clean and adjust as needed
  • Inspect heat exchanger or heating elements
  • Inspect flue system—check for proper attachment to the furnace, any dislocated sections, and for signs of corrosion. Replace if necessary.
  • Inspect control box, associated controls, wiring and connections
  • Clean or replace air filters
  • Inspect conditioned airflow system (ductwork)—check for leaks
  • WHILE YOUR SYSTEM IS OPERATING
  • Monitor system starting characteristics and capabilities
  • Listen for abnormal noise
  • Search for source of unusual odors
  • Monitor air conditioning and heat pump systems for correct refrigerant charge
  • Measure outdoor dry bulb temperature
  • Measure indoor dry and wet bulb temperature
  • Measure high and low side system pressures
  • Monitor gas furnace for correct line and manifold gas pressure—make adjustments as needed
  • Measure temperature rise and adjust airflow as needed
  • Check vent system for proper operation
  • Monitor system for correct line and load volts/amps
  • Monitor system operation per manufacturer's specifications
  • Provide system operation report and recommend repairs or replacement as necessary
  • NOTE: Thermal Zone recommends all maintenance and service work be performed by a professional air conditioning and heating dealer that holds the appropriate credentials to install and service air conditioning and heating equipment. 

 

 

 

 

 

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