We have lowered our Residential Diagnostic Fee
Now Only $55 during normal business hours.

Guardian Preventive Maintenance Plan


  • Two annual visits for season maintenance
  • 15% discount on parts and labor
  • No diagnostic fee while under the terms of the Guardian Preventive Maintenance Plan
  • Add additional units discounted

Benefits of the ClimateSmith Maintenance Plan

  • YOUR MONTHLY ENERGY COSTS ARE REDUCED – A well-maintained and clean system will operate more efficiently and use less energy.
  • PEACE OF MIND – You know your equipment is well maintained and operating efficiently.
  • YOU SAVE MONEY – Receive substantial savings on maintenance checks and repair calls. 
  • EXTENDS EQUIPMENT LIFE – Like your car, your heating/cooling system will last longer if it is periodically ‘tuned up’.
  • REDUCED BREAKDOWNS – Well-maintained equipment has fewer problems. 
  • CONVENIENCE – We will remind you when it is time to schedule your seasonal inspections.
  • PRIORITY SERVICE – Your system will be operating and providing comfort without long delays.


  • Check thermostat
  • Replace filter. Media filters are extra.
  • Check the heat exchanger.
  • Clean and check the burners.
  • Clean and adjust the pilot or ignition system.
  • Check flue, vent & chimney base.
  • Check all safety controls.
  • Check gas valve for proper gas pressure.
  • Check blower motor. Oil if necessary.
  • Check belt and adjust if necessary.
  • Check inducer motor. 
  • Check temperature rise.
  • Check for carbon monoxide.


  • Check thermostat
  • Replace Air filter. Media filters extra.
  • Clean Condenser Coil. Some commercial applications could incur extra charges.
  • Check Amperage of compressor and outdoor fan motor.
  • Check refrigerant pressures with superheat or sub-cooling.
  • Check contactor.
  • Check relays.
  • Check fuses.
  • Check condensate drain.
  • Check condensate pump where applicable.
  • Check temperature drop to verify airflow and that unit is cooling properly.


In addition to the appropriate checks above:

  • Replace nozzle and oil filter.
  • Set electrodes
  • Adjust air mixture.
  • Check primary control.


Note:  Since the condition of the oil is unknown we cannot guarantee the filter or the nozzle.

Includes air conditioning checks plus:

  • Check reversing valve.
  • Check the defrost control.
  • Check safety controls
  • Check sequencers.
  • Check heating elements amp draw.

Note: Condensing coil only cleaned at Air-conditioning check.

*Call for pricing on oil furnaces.