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Troubleshooting an Electronic Ignition Furnace

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Induced Draft Furnace - Component Detail
Induced Draft Furnace - Component Detail

Induced Draft Furnace - Component Detail

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Induced Draft Furnace Components
With this type of furnace you'll see the following components "under the hood":
  • Draft Inducer Motor
  • Pressure Switch
  • Pressure Switch Tube
  • Electronic Control Center or Pilot Control Module

    How It Works

  • The thermostat calls for heat,
  • Draft inducer motor starts up,
  • Pressure switch attached to the draft motor by a small tube will sense the negative pressure created by the draft inducer,
  • The draft inducer motor runs for 30 to 60 seconds,
  • Flame sensor senses heat from the pilot or HSI and allows gas to flow to burners,
  • Gas burner is ignited by the hot surface igniter or the intermittent pilot,
  • These processes are controlled by the electronic control center module.
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