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Daikin · Furnace

EEn Igniter open

High severity Daikin DR96TN/DD96TN

What the control is telling you

The control sees an open igniter circuit (igniter burned out or disconnected).

Applies to: Daikin DR96TN (upflow/horizontal) and DD96TN (downflow/horizontal) two-stage 96% furnaces with 9-speed ECM motor, R-32 ready

Likely causes

  • Igniter element open/cracked
  • Igniter plug or wiring loose or broken

Test and repair steps

  1. Check the igniter plug and wiring back to the control.
  2. Power off, let the igniter cool and measure resistance: 37-68 ohms (silicon nitride), 30-300 ohms (80% carbide mini igniter). Open = replace.
  3. Handle the new igniter by its base only - touching the element or rough handling shortens its life.
  4. During warm-up the silicon nitride igniter should draw 0.37 to 0.68 A at 120 V (two-stage manuals).

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Source: Daikin RSD6612304 (DR96TN/DD96TN service), 2 Stage Troubleshooting Codes, p.28-29. Summarized in our own words; check the original manual for your model.

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For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.