HVACopediaDaikin furnace error codes
25 codes with causes and test steps, plus 1 settings tables.
| Code | Meaning | Severity |
|---|---|---|
| E10 | Grounding fault / poor neutral connection | High |
| E11 | Flame rollout switch open | Critical |
| EE0 | Lockout - too many ignition retries (3) | High |
| EE1 | Pressure switch closed at start of heating cycle | Medium |
| EE2 | Pressure switch did not close (inducer runs, no ignition) | Medium |
| EE3 | High (primary) limit open | High |
| EE4 | Flame sensed with no call for heat | Critical |
| EE5 | Open fuse (short in low voltage wiring) | Medium |
| EE6 | Low flame signal | Low |
| EE8 | High-stage pressure switch closed at start of heating cycle | Medium |
| EE9 | High-stage pressure switch did not close | Medium |
| EAF | R-32 sensor communication lost - mitigation mode | High |
| EAL | R-32 refrigerant leak detected - mitigation mode | Critical |
| EAS | R-32 sensor fault - mitigation mode | High |
| EAr | A2L relay fault - mitigation mode | High |
| EEA | Reversed line polarity or grounding error | High |
| EEC | Internal gas valve error - valve energized when it should not be | Critical |
| EEE | Internal control fault (IRQ loss) | High |
| EEH | Twinning error | Low |
| EEJ | Inducer relay error | High |
| EEL | Igniter relay / igniter circuit fault | High |
| EEb | External gas valve error - valve not energized when it should be | High |
| EEn | Igniter open | High |
| EbL | Low circulator current - hard lockout | High |
| EbU | Unexpected circulator current - hard lockout | High |
Settings and specs
Normal status displays (7-segment)
Installer menu · Daikin DR96TN/DD96TN
| Mode | Display |
|---|---|
| Idle | IdL |
| Continuous fan | FAn |
| Cooling, low stage | 1AC |
| Cooling, high stage | 2AC |
| Gas heat, low stage | gH1 |
| Gas heat, high stage | gH2 |
| Factory (OEM) test mode | EOL |
- These are normal operating displays, not fault codes.
Source: Daikin RSD6612304 (DR96TN/DD96TN service), 2 Stage Status Codes p.27
Models covered
DD96TN0403BNDD96TN0603BNDD96TN0803BNDD96TN1005CNDR96TN0303ANDR96TN0403ANDR96TN0603ANDR96TN0603BNDR96TN0803BNDR96TN0804CNDR96TN1004CNDR96TN1005CNDR96TN1205DN
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.