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Daikin Furnace Error Codes

Updated · by Aurora Star Tech Inc.

25 Daikin Furnace error codes and diagnostic codes, with causes and troubleshooting steps for each. Select a code, or find your model below.

Homeowner with a furnace problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Daikin Furnace error codes list

CodeMeaningSeverity
E10Grounding fault / poor neutral connectionHigh
E11Flame rollout switch openCritical
EAFR-32 sensor communication lost - mitigation modeHigh
EALR-32 refrigerant leak detected - mitigation modeCritical
EArA2L relay fault - mitigation modeHigh
EASR-32 sensor fault - mitigation modeHigh
EbLLow circulator current - hard lockoutHigh
EbUUnexpected circulator current - hard lockoutHigh
EE0Lockout - too many ignition retries (3)High
EE1Pressure switch closed at start of heating cycleMedium
EE2Pressure switch did not close (inducer runs, no ignition)Medium
EE3High (primary) limit openHigh
EE4Flame sensed with no call for heatCritical
EE5Open fuse (short in low voltage wiring)Medium
EE6Low flame signalLow
EE8High-stage pressure switch closed at start of heating cycleMedium
EE9High-stage pressure switch did not closeMedium
EEAReversed line polarity or grounding errorHigh
EEbExternal gas valve error - valve not energized when it should beHigh
EECInternal gas valve error - valve energized when it should not beCritical
EEEInternal control fault (IRQ loss)High
EEHTwinning errorLow
EEJInducer relay errorHigh
EELIgniter relay / igniter circuit faultHigh
EEnIgniter openHigh

Find codes by Daikin model

DD96TN0403BNDD96TN0603BNDD96TN0803BNDD96TN1005CNDR96TN0303ANDR96TN0403ANDR96TN0603ANDR96TN0603BNDR96TN0803BNDR96TN0804CNDR96TN1004CNDR96TN1005CNDR96TN1205DN

Furnace troubleshooting guides

Daikin Furnace specs and setup data

Homeowner help: Furnace Not Turning On: What to Check · Furnace Blinking Light: What the Flash Codes Mean

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

© 2026 Aurora Star Tech Inc. All rights reserved. This page may not be copied, republished or used to train other systems without written permission.

Emergency Furnace Repair

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