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Daikin · Furnace

E10 Grounding fault / poor neutral connection

High severity Daikin DR96TN/DD96TN

What the control is telling you

The control detected a grounding error or a poor neutral connection. The furnace will not operate.

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

Likely causes

  • Loose or high-resistance neutral connection
  • Missing or poor ground path

Test and repair steps

  1. Check the neutral wire connection at the furnace junction box, the control board and the panel; tighten or repair.
  2. Verify continuity from the furnace to the ground source (ground wire back to the panel).
  3. Power off and measure neutral (white) to burner resistance - it should be very low (manual: less than 2 ohms).
  4. Restore power and confirm the code clears.

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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.

Homeowner looking at this code? See what it means for you and when to call a technician.

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.