Daikin Error Code H6: Position Sensor Fault
Warning: Your Daikin HVAC system has detected a position sensor fault, which may cause comfort issues and reduced system efficiency. It's safe to use, but a professional repair is recommended.
How to Fix Daikin Code H6
- Check if the indoor unit's fan is running and if it's set to the correct speed.
- Inspect the position sensor for any visible damage or dirt. If dirty, gently clean it with a soft brush.
- If the fan isn't running or isn't set to the correct speed, try resetting your Daikin HVAC system by turning off the power at the circuit breaker for 30 seconds, then turning it back on.
- If the issue persists, call a professional HVAC technician for further diagnosis and repair.
How to Reset Daikin Code H6
- Turn off the unit using the remote control or wall controller.
- Turn off the circuit breaker for the outdoor and indoor units. Wait 60 seconds.
- Restore power at the breaker.
- Turn the unit on with the remote control. If the error returns, the fault needs professional diagnosis.
Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.
What Does Daikin Error Code H6 Mean?
The Daikin H6 error code indicates a problem with the system's position sensor, which is responsible for tracking the indoor unit's fan position. This sensor helps maintain proper airflow and ensures the system operates at peak efficiency. When the sensor malfunctions, it may cause the fan to run at the wrong speed or not at all, leading to comfort issues and reduced system performance.
Common Causes
- Wiring issues or damaged sensor
- Incorrect sensor installation or calibration
- Dirt or debris buildup on the sensor
- Faulty control board or communication between components
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| Indoor unit fan is not running | Measure voltage at the fan motor terminals | 120V AC (or 24V DC for variable speed fans) when the system is calling for cooling or heating |
| Fan is running but at the wrong speed | Inspect the position sensor wiring for any breaks, corrosion, or improper connections | Intact wiring with proper connections |
Applicable Daikin Models
- Daikin Comfort(electric)
- Daikin Fit(electric)
- Daikin Intelligent Touch(electric)
- Daikin Latitude(electric)
- Daikin Unitary System(electric)
- FIT(electric)
- Inverter Ducted Split System(electric)
- LV Series(electric)
- MXS(electric)
- Multi-Zone(electric)
- NCB(electric)
- NCM(electric)
- NCV(electric)
- NCW(electric)
- NMB(electric)
- NMP(electric)
- NPE(electric)
- NTV(electric)
- NW(gas)
- NWZ(dual_fuel)
- Quaternity(electric)
- SkyAir(electric)
- VRV(electric)
- VRV IV(electric)
Replacement Parts
| Part | OEM Number | Est. Cost | Where to Buy |
|---|---|---|---|
| Position Sensor | 42150C1021 | — | Find Part |
Related Codes on Same Models
Other codes that affect the same Daikin model families as H6.
| Code | Description | Severity |
|---|---|---|
| A1 | Indoor PCB Defective | Warning |
| A3 | Drain Level System Fault | Warning |
| A5 | Freeze-Up/Overheat Protection | Warning |
| A6 | Fan Motor Lock/Overcurrent | Warning |
| C4 | Heat Exchanger Thermistor Fault | Warning |
| C9 | Suction Air Thermistor Fault | Warning |
| E1 | Outdoor PCB Defective | Warning |
| E3 | High Pressure Switch Activated | Warning |
| E4 | Low Pressure Switch Activated | Warning |
| E5 | Compressor Motor Lock | Warning |