Daikin Error Code Reference — All 25 Codes
Complete Daikin error code cheat sheet. All 25 fault codes with plain-English explanations and direct links to fix guides.
Use this page when your Daikin furnace, air conditioner, heat pump, or mini split is flashing a fault. Start with the exact code, then open the fix guide to diagnose airflow, ignition, sensor, pressure switch, board, or communication problems before you order parts or book a service call.
Tip: search the exact brand, model, and code together, for example "Daikin error code 13" or "Daikin pressure switch fault".
| Error Code | What It Means | Often a cheap fix? | Guide |
|---|---|---|---|
| Daikin A3 Error Code | Causes & Fix | — | Fix → |
| Daikin A6 Error Code | Indoor Fan Motor Fix | — | Fix → |
| Daikin C4 Error Code | Heat Exchanger Coil Sensor: Causes & Fix | — | Fix → |
| Daikin C4 Error Code | Indoor Heat Exchanger Thermistor Fix | — | Fix → |
| Daikin Chiller Fault Codes | Complete Troubleshooting Guide | — | Fix → |
| Daikin E1 Error Code Fix | Indoor Sensor Fault | — | Fix → |
| Daikin E3 Error Code | Causes & Fix | — | Fix → |
| Daikin E6 Error Code | Causes & Fix | — | Fix → |
| Daikin F3 Error Code | Causes & Fix | — | Fix → |
| Daikin F9 Error Code: Causes, Diagnosis & How to Fix It | Seeing a Daikin F9 error? Learn how to pull the exact fault code from the remote, check the indoor coil thermistor, and know when C4 or a pro repair is the real fix. | — | Fix → |
| Daikin Fit Error Codes | Inverter Heat Pump Diagnostic Guide | — | Fix → |
| Daikin H6 Error Code | Indoor Fan Motor Lock Fault Fix | — | Fix → |
| Daikin H8 Error Code | Causes & Fix | — | Fix → |
| Daikin J3 Error Code | Discharge Pipe Temperature Sensor Fault Fix | — | Fix → |
| Daikin L5 Error Code | Compressor Lock Fix | — | Fix → |
| Daikin Mini Split Error Codes | Complete Reference | — | Fix → |
| Daikin Mini Split Not Cooling | Causes & Fix | — | Fix → |
| Daikin R-32 System U4 Error Code | Communication Fault Fix | — | Fix → |
| Daikin RXQ VRV System Error Codes (Outdoor Unit): Complete Guide | Daikin RXQ VRV outdoor unit error codes and fault diagnostics. U-series fault codes, causes, and technician-level troubleshooting. | — | Fix → |
| Daikin RXYQ VRV System Error Codes | Complete Fault Code Guide | — | Fix → |
| Daikin U4 Error Code | Indoor-Outdoor Communication Fix | — | Fix → |
| Daikin U6 Error Code | Causes & Fix | — | Fix → |
| Daikin UA Error Code | Mismatched Indoor/Outdoor Unit Fix | — | Fix → |
| Daikin VRV / VRF U4 Error Code | Communication Fault Fix | — | Fix → |
| Daikin VRV System Error Codes: Complete Guide | Complete guide to Daikin VRV (Variable Refrigerant Volume) system error codes. Covers U, E, A, C, F, and H-series codes with causes and technician fixes. | — | Fix → |