Daikin Air Conditioner Error UF
⚡ Quick Answer: The Daikin Air Conditioner UF error code signifies a communication failure between the indoor and outdoor units. This issue may prevent the system fro... ✅ DIY Fixable
What Does Error UF Mean?
The Daikin Air Conditioner UF error code signifies a communication failure between the indoor and outdoor units. This issue may prevent the system from starting normal cooling or heating operations, often arising during the startup or check phase. Common causes include transmission errors, configuration mismatches, or physical connection issues. Prompt attention is necessary to resolve this error to restore functionality.
Common Symptoms:
- Unit stops operation and displays UF code
- Error occurs during startup or check/run phase
- System may not start normal cooling/heating
Possible Causes
- Indoor–outdoor unit communication/ transmission error (medium)
- Configuration or piping/connection mismatch (medium)
- Physical connection issue (wiring or valves) (medium)
- Control or printed circuit board abnormality (low)
How to Fix Error UF
DIY Fix Power cycle and basic check
- Turn off the AC and cut power via breaker or unplug
- Wait ~1 minute
- Restore power and try restarting
Technician Only Inspect communication links and configuration
- Verify indoor–outdoor communication wiring continuity and secure connections
- Check system configuration settings according to model specifications
- Ensure piping/valves are correctly installed and open
- Use service tool or app to pull detailed fault logs
Parts needed: communication cables/connectors, electrical harness, service diagnostic tools
- If error persists after power cycle and basic checks
- If wiring, valves, or PCB faults are suspected
- If safety devices (e.g., breaker) trip repeatedly
Next step
Choose the next step for UF
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Browse by model — no specific failed part is claimed
Model-compatible Air Conditioner parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Search results are not a diagnosis. Verify both the complete appliance model and the retailer's fit information before ordering.
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Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Air Conditioner Fin Cleaner
For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.
Model-Compatible Washable AC Filter
A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.
Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
Common Questions
What does UF error mean on Daikin Air Conditioner?
UF indicates a communication failure between indoor and outdoor units, affecting cooling/heating.
Can I fix Daikin Air Conditioner UF error myself?
Yes, you can perform a power cycle and basic checks to attempt a reset.
How much does it cost to fix UF error?
The estimated repair cost ranges from ¥5,000 to ¥25,000.
When should I call a technician for UF?
Call a technician if the error persists after basic checks or if wiring or PCB faults are suspected.
Sources & References
- What is a UF fault? – Daikin NZ (community)
Data last verified: 2026-07-31
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