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Erv Smith Services - Heating and Air Conditioning
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Gas Fired Heating & Air Conditioning


  • Start and verify unit operation.
  • Disengage power source.
  • Inspect pilot light and thermacouple function/safety controls.
    • Flame
    • Electronic Ignition
    • Standing pilot
    • Safety on gas valve
    • Safety on pilot
    • Safety of fan and limit
  • Remove and clean burners.
  • Remove and clean pilot assembly.
  • Replace thermacouple, if applicable.
  • Inspect and clean ignition.
  • Vacuum top and bottom of heat exchanger.
  • Inspect heat exchanger for cracks, holes, rusting.
  • Reinstall burners.
  • Assemble and reinstall pilot assembly.
  • Remove blower assembly.
  • Clean blower assembly.
  • Vacuum blower housing.
  • Oil blower motor.
  • Inspect blower bearings, oil if applicable.
  • Inspect belt on blower, replace if necessary.
  • Adjust belt tension.
  • Reinstall blower assembly.
  • Replace air filter/media.
  • Clean Electronic, Electrostatic, or washable filters.
  • Inspect and tighten electrical connections.
  • Relight pilot.
  • Engage/Start unit and check system cycle.
  • Inspect gas valve function.
  • Verify and adjust gas pressure.
  • Measure volts and amps on motors.
  • Check temperature differential. Adjust fan speed if necessary.
  • Calibrate thermostat.
  • Verify air flow and air distribution - adjust registers, if necessary.
  • PTS Opinion on Heating System.
  • Hot Water Heat System/Boiler - Balance and bleed radiators.
  • High Efficiency - Remove and clean flame sensor.
  • High Efficiency - Vacuum recuperative coil.
  • High Efficiency - Clean condensate drain.
  • High Efficiency - Inspect condensate lift pump, if applicable.
  • High Efficiency - Inspect venting for restrictions.
  • High Efficiency - clean pressure switch tube and air hole.
Gas Fired Heating & A/C Maintenance

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